var r=0,u=10,vector1=new Array(13),vector2=new Array(13)


function moureu3(id)
{

var l,j,prova,prova1,texte3,texte1,texte,texte2
	l=1
	j=0
	prova=""
	prova1=""
	texte3=""

	while (r<=11 && l==1)
	{
	p="uniu"+r
	j=r+2
	//if (r==6) j=7;
	//if (r==7) j=8;
	if (r==10) j=11;
	if (r==11) j=12;
	capa=id
	eval("texte=document.getElementById('"+capa+"').innerText")
	eval("texte1=document.getElementById('"+capa+"').innerHTML")
	texte2="<div align='center'><font size='5' face='Verdana, Arial, Helvetica, sans-serif'>?</font></div>"
	texte3="<div align='center'>"+texte1+"</div>"

	if(r<3 )
	{
		if (vector1[j]==texte || vector2[j]==texte)
		{
			eval("document.getElementById('"+p+"').innerHTML=texte3")
			r=r+1
			p="uniu"+r
			
			eval("document.getElementById('"+p+"').style.visibility='visible'")
			l=0
			comptadorencerts();
		}
		else
		{
				alert("No és correcte! Torna-ho a provar ")
			l=0
			comptadorerrors();
		}
	}
////////////////		
	if(r==3 && l==1)
	{
		if (vector1[j]==texte || vector2[j]==texte)
		{
			eval("document.getElementById('"+p+"').innerHTML=texte3");
			r=r+1
			l=0
			comptadorencerts();
			u=0
			apareixer()
			
		}						
			else
			{
			alert("No és correcte! Torna-ho a provar ")
			l=0
			comptadorerrors();
			}
	}		
	
	if(u<3 && l==1 )
	{
		if (vector1[j]==texte || vector2[j]==texte)
		{
			eval("document.getElementById('"+p+"').innerHTML=texte3")
			r=r+1
			p="uniu"+r
			u=u+1
			eval("document.getElementById('"+p+"').style.visibility='visible'")
			l=0
			comptadorencerts();
		}
		else
		{
			alert("No és correcte! Torna-ho a provar ")
			l=0
			comptadorerrors();
		}
	}
	if(u==3 && l==1)
	{
		if (vector1[j]==texte || vector2[j]==texte)
		{
			eval("document.getElementById('"+p+"').innerHTML=texte3");
			r=r+1
			l=0
			comptadorencerts();
			u=u+1
			apareixer3()
			 
		}						
			else
			{
			alert("No és correcte! Torna-ho a provar ")
			l=0
			comptadorerrors();
			}
	}
	if(u>3 && l==1 )
	{
		if (vector1[j]==texte )
		{
			eval("document.getElementById('"+p+"').innerHTML=texte3")
			r=r+1
			u=u+1
			comptadorencerts();
			if (r==12) break;
			p="uniu"+r
			eval("document.getElementById('"+p+"').style.visibility='visible'")
				if (r==9)
				{ r=r+1
				u=u+1
				p="uniu"+r
				eval("document.getElementById('"+p+"').style.visibility='visible'")		
				}
			l=0
		}
		else
		{
			alert("No és correcte! Torna-ho a provar ")
			l=0
			comptadorerrors();
		}
	}

	
			
}

}

function apareixer()
{


document.all['missatge1'].style.visibility="visible"
document.all['celiminar1'].style.visibility="visible"
document.all['celiminar2'].style.visibility="visible"
document.all['eliminar1'].style.visibility="visible"
document.all['eliminar2'].style.visibility="visible"
}
function apareixer3()
{
document.all['missatge1'].style.visibility="visible"
document.all['celiminar13'].style.visibility="visible"
document.all['celiminar23'].style.visibility="visible"
document.all['eliminar13'].style.visibility="visible"
document.all['eliminar23'].style.visibility="visible"
}
 


function principi21(id){
capapitjada=id

eval("texte=document.getElementById('"+capapitjada+"').innerText")

capaeliminar='eliminar1'

if (capapitjada==capaeliminar)

{

document.getElementById('celiminar1').style.top=302
document.getElementById('celiminar1').style.left=200
document.getElementById('celiminar2').style.top=285
document.getElementById('celiminar2').style.left=85
document.all['missatge1'].style.visibility="hidden"
document.all['eliminar1'].style.visibility="hidden"
document.all['eliminar2'].style.visibility="hidden"
document.all['uniu4'].style.visibility="visible"
document.all['uniu5'].style.visibility="visible"
}
else
{alert("ERROR!")}
}
function principi22(id){
capapitjada=id
eval("texte=document.getElementById('"+capapitjada+"').innerText")
capaeliminar='eliminar1'
if (capapitjada==capaeliminar)
{
document.getElementById('celiminar1').style.top=335
document.getElementById('celiminar1').style.left=200
document.getElementById('celiminar2').style.top=315
document.getElementById('celiminar2').style.left=85
document.all['missatge1'].style.visibility="hidden"
document.all['eliminar1'].style.visibility="hidden"
document.all['eliminar2'].style.visibility="hidden"
document.all['uniu4'].style.visibility="visible"
document.all['uniu5'].style.visibility="visible"
}
else
{alert("ERROR!")}
}
function principi23(id){
capapitjada=id
eval("texte=document.getElementById('"+capapitjada+"').innerText")
capaeliminar='eliminar1'
if (capapitjada==capaeliminar)
{
document.getElementById('celiminar1').style.top=335
document.getElementById('celiminar1').style.left=200
document.getElementById('celiminar2').style.top=315
document.getElementById('celiminar2').style.left=75
document.all['missatge1'].style.visibility="hidden"
document.all['eliminar1'].style.visibility="hidden"
document.all['eliminar2'].style.visibility="hidden"
document.all['uniu4'].style.visibility="visible"
//document.all['uniu5'].style.visibility="visible"
}
else
{alert("ERROR!")}
}
function principi33(id){
capapitjada=id
eval("texte=document.getElementById('"+capapitjada+"').innerText")
capaeliminar='eliminar13'
if (capapitjada==capaeliminar)
{
document.getElementById('celiminar13').style.top=297
document.getElementById('celiminar13').style.left=194
document.getElementById('celiminar23').style.top=335
document.getElementById('celiminar23').style.left=319
document.all['missatge1'].style.visibility="hidden"
document.all['eliminar13'].style.visibility="hidden"
document.all['eliminar23'].style.visibility="hidden"
document.all['uniu8'].style.visibility="visible"
document.all['uniu9'].style.visibility="visible"
}
else
{alert("ERROR!")}
}
////////
function substituir1(){
eval("textefinal=document.getElementById('"+capaprincipi+"').innerHTML")
eval("document.getElementById('"+capafinal+"').innerHTML=textefinal")
eval("document.getElementById('"+capafinal+"').style.backgroundColor=color")
}


function crearcanvis3(){
var a,b,c,unitat_incognita=new Array(2)

//,,val_incognita,ordre1,m,d,vector,vectora,vectorb,d1,d2
b=Math.round(Math.random()*199);
 if (b<10) c=b;
 if (b==0){ b=1;c=1};
 if (b>=10) c=b/10;
 if (b>=100) c=b/100;
 xd=40
a=Math.round(Math.random()*1);
	switch(a)
	{
		case 0:
		
			vector=new Array("km<sup>2</sup>","hm<sup>2</sup>","dam<sup>2</sup>","m<sup>2</sup>","dm<sup>2</sup>","cm<sup>2</sup>","mm<sup>2</sup>","ha","daa","a","da","ca","ma","10<sup>10</sup>","10<sup>9</sup>","10<sup>8</sup>","10<sup>7</sup>","10<sup>6</sup>","10<sup>5</sup>","10<sup>4</sup>","10<sup>3</sup>","10<sup>2</sup>","10","1","10<sup>10</sup>","10<sup>-9</sup>","10<sup>-8</sup>","10<sup>-7</sup>","10<sup>-6</sup>","10<sup>-5</sup>","10<sup>-4</sup>","10<sup>-3</sup>","10<sup>-2</sup>","10<sup>-1</sup>",c);
			n=2;t=13;m=34;m1=6;m2=m1+1;m3=m2+5;m4=m3+1;m5=m4+10;m6=m5+1;m7=m6+10
			su=" una superfície de ";
			eq=". Emprau com equivalència implícita 1 m<sup>2</sup> = 1 ca ."
			a1=Math.round(Math.random()*1);
		
			if (a1==0)
			
				{ na="s";n1=2;t1=5;n2=1;t2=5;nc="ca";nc1="ca";nc3="ca"
				  vectora=new Array("km<sup>2</sup>","hm<sup>2</sup>","dam<sup>2</sup>","m<sup>2</sup>","dm<sup>2</sup>","cm<sup>2</sup>","mm<sup>2</sup>");
				  vectorb=new Array("ha","daa","a","da","ca","ma")
				  d1=3;d2=4;
		  			while(d1==3 || d2==4)
		    		{
						d1=Math.round(Math.random()*t1);
						d2=Math.round(Math.random()*t2);
		    		}
					unitat_incognita[0]=vectora[d1]
					unitat_incognita[1]=vectorb[d2]
				 d2=d2+7;
				}
				
			else
				{na="a";n1=1;t1=5;n2=2;t2=5;nc="m2";nc1="m2";nc3="m<sup>2</sup>"
				vectora=new Array("ha","daa","a","da","ca","ma")
 				vectorb=new Array("km<sup>2</sup>","hm<sup>2</sup>","dam<sup>2</sup>","m<sup>2</sup>","dm<sup>2</sup>","cm<sup>2</sup>","mm<sup>2</sup>");
				d1=4;d2=3;
		  		while(d1==4 || d2==3)	
		    		{
						d1=Math.round(Math.random()*t1);
						d2=Math.round(Math.random()*t2);
		    		}
					unitat_incognita[0]=vectora[d1]
					unitat_incognita[1]=vectorb[d2]
				 d1=d1+7;
				}
			break;
			
		case 1:
			t=3;n=3;m=33;m1=3;m2=m1+1;m3=m2+6;m4=m3+1;m5=m4+9;m6=m5+1;m7=m6+9;
			su=" un volum de "
			vector=new Array("m<sup>3</sup>","dm<sup>3</sup>","cm<sup>3</sup>","mm<sup>3</sup>","kl","hl","dal","l","dl","cl","ml","10<sup>9</sup>","10<sup>8</sup>","10<sup>7</sup>","10<sup>6</sup>","10<sup>5</sup>","10<sup>4</sup>","10<sup>3</sup>","10<sup>2</sup>","10","1","10<sup>-9</sup>","10<sup>-8</sup>","10<sup>-7</sup>","10<sup>-6</sup>","10<sup>-5</sup>","10<sup>-4</sup>","10<sup>-3</sup>","10<sup>-2</sup>","10<sup>-1</sup>",c)
			a1=Math.round(Math.random()*1);
			eq=". Emprau com equivalència implícita 1 dm<sup>3</sup> = 1 l ."
			if (a1==0)
			
				{ na="v";n1=3;t1=3;n2=1;t2=6;nc="l";nc1="l";nc3="l"
				  vectora=new Array("m<sup>3</sup>","dm<sup>3</sup>","cm<sup>3</sup>","mm<sup>3</sup>");
				  vectorb=new Array("kl","hl","dal","l","dl","cl","ml")
				  d1=1;d2=3;
				  			while(d1==1 || d2==3)
		    		{
						d1=Math.round(Math.random()*t1);
						d2=Math.round(Math.random()*t2);
		    		}
					unitat_incognita[0]=vectora[d1]
					unitat_incognita[1]=vectorb[d2]
				 d2=d2+4;
				}
				
				
			else
				{na="c";n1=1;t1=6;n2=3;t2=3;nc="dm3";nc1="dm3";nc3="dm<sup>3</sup>"
				vectora=new Array("kl","hl","dal","l","dl","cl","ml")
 				vectorb=new Array("m<sup>3</sup>","dm<sup>3</sup>","cm<sup>3</sup>","mm<sup>3</sup>");
				d1=3;d2=1;
							while(d1==3 || d2==1)
		    		{
						d1=Math.round(Math.random()*t1);
						d2=Math.round(Math.random()*t2);
		    		}
					unitat_incognita[0]=vectora[d1]
					unitat_incognita[1]=vectorb[d2]
				 d1=d1+4;
				}	
			break;
						
	}
 for (var j=0;j<=m;j++)
{
      if (j>=0 && j<=m1)
		{
		xdd=xd+52*j
		capaup="capau"+j
		str="<div id='"+capaup+"' style='position:absolute; left:"+xdd+"px; top:155px; width:50px; height:27px; z-index:1; background-color: #009900; layer-background-color: #009900'   onClick='moureu3(id)'><div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>"+vector[j]+"</font></div></div>";
		document.write(str);
   		}
		if (j>=m2 && j<=m3)
		{
		xdd=xd+52*(j-m2)
		capaup="capau"+j
		str="<div id='"+capaup+"' style='position:absolute; left:"+xdd+"px; top:184px; width:50px; height:27px; z-index:1; background-color: #00CC00; layer-background-color: #00CC00'   onClick='moureu3(id)'><div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>"+vector[j]+"</font></div></div>";
		document.write(str);
   		}
      if (j>=m4 && j<=m5)
       {
		xdd=xd+52*(j-m4)
		capaup="capau"+j
		str="<div id='"+capaup+"' style='position:absolute; left:"+xdd+"px; top:213px; width:50px; height:27px; z-index:1; background-color: #FF9966; layer-background-color: #FF9966'   onClick='moureu3(id)'><div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>"+vector[j]+"</font></div></div>";
		document.write(str);
       }
       if (j>=m6 && j<=m7)
       {
		xdd1=xd+52*(j-m6)
		capaup="capau"+j
		str="<div id='"+capaup+"' style='position:absolute; left:"+xdd1+"px; top:242px; width:50px; height:27px; z-index:1; background-color: #FF9966; layer-background-color: #FF9966'   onClick='moureu3(id)'><div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>"+vector[j]+"</font></div></div>";
		document.write(str);
       }
	   
	   	

}


 /////////////////////////////////////////////

// triar canvi de magnitud

//triar el canvi d'unitat
 //unitat_incognita,val_incognita,ordre1,vector1,vector2
tex=""
capaes=""
d=0
unitat_0=""
unitat_1=""			
//unitat_incognita=new Array(10)
val_incognita=new Array(2)
ordre1=new Array(2)
			capaes="capau"+d1
			eval("tex=document.getElementById('"+capaes+"').innerText")
			unitat_0=tex
			capaes="capau"+d2
			eval("tex=document.getElementById('"+capaes+"').innerText")
			unitat_1=tex
		//crear vector
		switch(a)
		{
			case 0:
			
				if (a1==0){t1=5;d2=d2-7;j1=3-d1;j2=d2-4;}
					else {t1=5;d1=d1-7;j1=4-d1;j2=d2-3;}
			break;
			case 1:
			
				if (a1==0){t1=3;d2=d2-4;j1=1-d1;j2=d2-3;}
					else {t1=6;d1=d1-4;j1=3-d1;j2=d2-1;}
			break;
		}
				
			m1=-j1
			m2=-j2 
			if ( b<100) {k=n1*j1+n2*j2+1};
			if ( b<10) {k=n1*j1+n2*j2};
			if (b>100) k=n1*j1+n2*j2+2;
			
			vector1[0]=b
			vector1[1]=unitat_incognita[0]
			vector1[2]=unitat_0
			vector1[3]=nc
			vector1[4]="1"
			
			switch(n1)
			{
			case 1:
				if (j1==1){vector1[5]="10"}
				else{vector1[5]="10"+n1*j1};
				break;
			case 2:
				if (j1==1){vector1[5]="102"}
				else{vector1[5]="10"+n1*j1};
				break;
			case 3:
				if (j1==1){vector1[5]="103"}
				else{vector1[5]="10"+n1*j1};
				break;
			}
			
			vector1[6]=nc
			vector1[7]=unitat_1
			vector1[8]="1"
			switch(n2)
			{
			case 1:
				if (j2==1){vector1[9]="10"}
				else{vector1[9]="10"+n2*j2};
				break;
			case 2:
				if (j2==1){vector1[9]="102"}
				else{vector1[9]="10"+n2*j2};
				break;
			case 3:
				if (j2==1){vector1[9]="103"}
				else{vector1[9]="10"+n2*j2};
				break;
			}

			
			vector1[10]=c
			if (k!=1)vector1[11]="10"+k;
			if (k==0)vector1[11]="1"; 
			if (k==1)vector1[11]="10";
			vector1[12]=unitat_1
			
			vector2[0]=b
			vector2[1]=unitat_incognita[0]
			vector2[2]=unitat_0
			vector2[3]=nc
			switch(n1)
			{
			case 1:
				if (m1==1){vector2[4]="10"}
				else{vector2[4]="10"+n1*m1};
				break;
			case 2:
				if (m1==1){vector2[4]="102"}
				else{vector2[4]="10"+n1*m1};
				break;
			case 3:
				if (m1==1){vector2[4]="103"}
				else{vector2[4]="10"+n1*m1};
				break;
			}
			vector2[5]="1"
			vector2[6]=nc
			vector2[7]=unitat_1
			
			switch(n2)
			{
			case 1:
				if (m2==1){vector2[8]="10"}
				else{vector2[8]="10"+n2*m2};
				break;
			case 2:
				if (m2==1){vector2[8]="102"}
				else{vector2[8]="10"+n2*m2};
				break;
			case 3:
				if (m2==1){vector2[8]="103"}
				else{vector2[8]="10"+n2*m2};
				break;
			}
			vector2[9]="1"
			
			vector2[10]=c
			if (k!=1)vector2[11]="10"+k;
			if (k==0)vector2[11]="1"; 
			if (k==1)vector2[11]="10";
			vector2[12]=unitat_1
// crearcapes per factors
var capapitjada, capaeliminar
str="<div id='factor' style='position:absolute; left:40px; top:317px; width:44px; height:27px; z-index:2; visibility: visible'><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>"+vector1[0]+"<sup>&nbsp;</sup> </font> </div>";
document.write(str);
str="<div id='factor1' style='position:absolute; left:80px; top:317px; width:45px; height:27px; z-index:2; visibility: visible'><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>"+vector1[1]+"<sup>&nbsp;</sup> </font> </div>";
document.write(str);
str="<div id='Layer5' style='position:absolute; left:129px; top:317px; width:125px; height:27px; z-index:5; visibility: visible'><img src='puntratllapunt.gif' width='138' height='35'></div>";
document.write(str);
str="<div id='Layer6' style='position:absolute; left:258px; top:317px; width:125px; height:27px; z-index:5; visibility: visible'><img src='ratlla.gif' width='138' height='35'></div>";
document.write(str);
str="<div id='uniu3' style='position:absolute; left:139px; top:300px; width:50px; height:27px; z-index:9; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu1' style='position:absolute; left:194px; top:300px; width:50px; height:27px; z-index:8; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu2' style='position:absolute; left:140px; top:338px; width:50px; height:27px; z-index:7; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu0' style='position:absolute; left:194px; top:338px; width:50px; height:27px; z-index:6; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: visible'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);

str="<div id='uniu6' style='position:absolute; left:265px; top:338px; width:50px; height:27px; z-index:6; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu4' style='position:absolute; left:319px; top:338px; width:50px; height:27px; z-index:6; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu5' style='position:absolute; left:319px; top:300px; width:50px; height:27px; z-index:6; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu7' style='position:absolute; left:265px; top:300px; width:50px; height:27px; z-index:6; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>";
document.write(str);
str="<div id='uniu8' style='position:absolute; left:400px; top:317px; width:35px; height:27px; z-index:4; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'><font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>"
document.write(str);
str="<div id='uniu9' style='position:absolute; left:435px; top:317px; width:6px; height:27px; z-index:3; visibility: hidden'><font face='Verdana, Arial, Helvetica, sans-serif' size='4' color='#000000'><sup>&nbsp;</sup>&middot;</font></div>"
document.write(str);
str="<div id='uniu10' style='position:absolute; left:448px; top:317px; width:50px; height:27px; z-index:2; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'><font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>"
document.write(str);
str="<div id='uniu11' style='position:absolute; left:501px; top:317px; width:50px; height:27px; z-index:1; background-color: #FF6633; layer-background-color: #FF0000; border: 1px none #000000; visibility: hidden'><font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>?</font></div>"
document.write(str);
var ss="Quines unitats heu de simplificar ?"
var x="X"
str="<div id='missatge1' style='position:absolute; left:50px; top:270px; width:357px; height:27px; z-index:15; background-color: #0000FF; layer-background-color: #0000FF; border: 1px none #000000; visibility: hidden'><font face='Verdana, Arial, Helvetica, sans-serif' size='4' color='#ffffff'>"+ss+"</font></div>"
document.write(str);
str="<div id='celiminar1' style='position:absolute; left:300px; top:270px; width:32px; height:27px; z-index:11; visibility: hidden '> <font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000 '>xxx</font></div>"
document.write(str);
str="<div id='celiminar13' style='position:absolute; left:300px; top:270px; width:32px; height:27px; z-index:11; visibility: hidden '> <font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000 '>xxx</font></div>"
document.write(str);
str="<div id='celiminar2' style='position:absolute; left:300px; top:270px; width:32px; height:30px; z-index:12; visibility: hidden'> <font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>xxx</font> </div>"
document.write(str);
str="<div id='celiminar23' style='position:absolute; left:300px; top:270px; width:32px; height:30px; z-index:12; visibility: hidden'> <font face='Verdana, Arial, Helvetica, sans-serif' size='5' color='#000000'>xxx</font> </div>"
document.write(str);
str="<div id='eliminar1' style='position:absolute; left:410px; top:270 px; width:45px; height:27px; z-index:100; background-color: #0000FF; layer-background-color: #0000FF; border: 1px none #000000; visibility: hidden'  onClick='principi23(id)'> <div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4' color='#ffffff'>"+unitat_incognita[0]+" </font></div></div>"
document.write(str);
str="<div id='eliminar13' style='position:absolute; left:410px; top:270 px; width:45px; height:27px; z-index:100; background-color: #0000FF; layer-background-color: #0000FF; border: 1px none #000000; visibility: hidden'  onClick='principi33(id)'> <div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4' color='#ffffff'>"+nc3+" </font></div></div>"
document.write(str);
str="<div id='eliminar2' style='position:absolute; left:460px; top:270px; width:45px; height:27px; z-index:14; background-color: #0000FF; layer-background-color: #0000FF; border: 1px none #000000; visibility: hidden' onClick='principi23(id)'> <div class=ma><font face='Verdana, Arial, Helvetica, sans-serif' size='4' color='#ffffff'>"+nc3+"</font> </div></div>"
document.write(str);
str="<div id='eliminar23' style='position:absolute; left:460px; top:270px; width:45px; height:27px; z-index:14; background-color: #0000FF; layer-background-color: #0000FF; border: 1px none #000000; visibility: hidden' onClick='principi33(id)'><div class=ma> <font face='Verdana, Arial, Helvetica, sans-serif' size='4'color='#ffffff' >"+unitat_incognita[1]+"</font></div> </div>"
document.write(str);
str="<div id='Layer7' style='position:absolute; left:42px; top:95px; width:558px; height:56px; z-index:101'><font face='Verdana, Arial, Helvetica, sans-serif' size='4'>Expressau en potències de 10"+su+"<font color='#0000FF'>"+b+'  '+vector1[1]+"</font> en <font color='#0000FF'>"+unitat_incognita[1]+"</font>"+eq+"</div>"
document.write(str);
}
function comptadorencerts(){
	contadoru++
	document.form4.textfield1.value=contadoru;
	if (contadoru==11){
		//estat=0;
		if (contadorp<=2) alert("Molt bé!!");
		else{alert("Has acabat,però tens molts d'errors.\n\n Pensa un poc més abans de clicar!!");
		}
		document.all['nouexercici'].style.visibility='visible';
		}
}
function comptadorerrors(){
	contadorp++
	document.form5.textfield2.value=contadorp;
	if (contadorp>=11)
	{
		alert("Tens massa errors, torna a començar. ");
		document.location.reload();
	}
}