<html>
<head>
<script language="JavaScript" type="text/javascript">
var c=new Array('num1','num2','num3','num4','num5');
function marcar(check){
for(z=0;z<c.length;z++){
document.forms[0][c[z]].checked=check.checked;
}
calcular();
}
function calcular(){
tt=0;
for(z=0;z<c.length;z++){
tt+=(document.forms[0][c[z]].checked)?parseInt(document.forms[0][c[z]].value):0;
}
document.forms[0]['total'].value=formatCurrency(tt);
}
function formatCurrency(num)
{
num = num.toString().replace(/\€|\,/g,'');
if(isNaN(num))
num = "0";
cents = Math.floor((num*100+0.5)%100);
num = Math.floor((num*100+0.5)/100).toString();
if(cents < 10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));
return (num + "." + cents+ " €" );
}
</script>
</head>
<body>
<form method="POST">
<p align="center"><font size="2">El total Anual es: <input readonly size="6" name="total">
IVA. Incluido</font></p>
<table border="0" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td width="752" align="left" colspan="5">
<p align="center"><input type="checkbox" onclick="marcar(this)" value="ON"><font size="2">Todos</font>
</tr>
<tr>
<td width="214" align="left"> <font size="2"><input onclick="calcular()" type="checkbox" value="34.40" name="num1">Uno</font></td>
<td width="108" align="left">
<p align="left"><font size="2"><input onclick="calcular()" type="checkbox" value="34.40" name="num2">Dos</font></td>
<td width="108" align="left">
<p align="left"><font size="2"><input onclick="calcular()" type="checkbox" value="34.40" name="num3">Tres</font></td>
<td width="108" align="left">
<p align="left"><font size="2"><input onclick="calcular()" type="checkbox" value="34.40" name="num4">Cuatro</font></td>
<td width="216" align="left">
<p align="left"><font size="2"><input onclick="calcular()" type="checkbox" value="34.40" name="num5">Cinco</font></td>
</tr>
</table>
<p align="center"><input type="submit" value="Enviar" name="B1"><input type="reset" value="Restablecer" name="B2"></p>
<input type="hidden" name="fvalida" value="0">
</form>
</body>
</html>