Måske sådan, med ændring af disabled-felterne ?-)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"
http://www.w3.org/TR/html4/loose.dtd"><html>
<head>
<title>Bestillingsformular</title>
<meta name="Generator" content="Stone's WebWriter 4">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
</style>
<script language="javascript" type="text/javascript">
numFields = 3;
function beregn(fld){
if(!fld.value.match(/^\d+\.?\d*$/)){
alert('Ugyldigt antal angivet');
fld.value = fld.defaultValue;
return false;
}
var num = fld.name.substring(5);
var p = document.getElementById("Pris"+num).value;
var s = document.getElementById("Sum"+num);
var ialt = document.getElementById("Ialt0");
var ialt1 = document.getElementById("Ialt1");
var pris = p;
if(p.indexOf(",-")>-1){
pris = p.substring(0,p.indexOf(",-"));
}else{
komma = p.indexOf(",")
if(p.indexOf(",")){
pris = (p.substring(0,komma)+"."+p.substring(komma+1));
}
}
pris = +pris;
var sum = pris*fld.value;
s.value = formatNum(sum);
sum = 0;
for(i=1;numFields+1>i;i++){
sum += +document.getElementById("Sum"+i).value
}
ialt.value = formatNum(sum);
ialt1.value = formatNum(sum*1.25);
}
function formatNum(t){
if((""+t).length>(""+t).indexOf(".")+3)t=(Math.round(t*100))/100;
if((""+t).indexOf(".")==-1)t=t+".00";
if((""+t).indexOf(".")+2==(""+t).length)t=t+"0";
return t;
}
</script>
</head>
<body>
<br>
<form id="minForm" name="minForm" action="
http://www.eksperten.dk" method="post" onsubmit="alert('Bestillingen bliver nu sendt !-)');return false">
<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td>
<input id="Antal1" name="Antal1" type="text" value="Indtast antal" onchange="beregn(this);" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;" size="20"></td>
<td align="right">
<input id="Pris1" name="Pris1" type="text" value="100,20" size="20" disabled style="text-align:right;"> </td>
<td>
<input id="Sum1" name="Sum1" type="text" value="" disabled size="20" style="text-align:right;"> </td>
</tr>
<tr>
<td>
<input id="Antal2" name="Antal2" type="text" value="Indtast antal" onchange="beregn(this);" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;" size="20"></td>
<td align="right">
<input id="Pris2" name="Pris2" type="text" value="25,-" size="20" disabled style="text-align:right;"> </td>
<td>
<input id="Sum2" name="Sum2" type="text" value="" disabled size="20" style="text-align:right;"> </td>
</tr>
<tr>
<td>
<input id="Antal3" name="Antal3" type="text" value="Indtast antal" onchange="beregn(this);" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;" size="20"></td>
<td align="right">
<input id="Pris3" name="Pris3" type="text" value="93,75" size="20" disabled style="text-align:right;"> </td>
<td>
<input id="Sum3" name="Sum3" type="text" value="" disabled size="20" style="text-align:right;"> </td>
</tr>
<tr>
<td colspan="2" align="right">
Pris ekskl. moms: </td>
<td>
<input id="ialt0" name="ialt0" type="text" value="" disabled size="20" style="text-align:right;"> </td>
</tr>
<tr>
<td colspan="2" align="right">
Samlet pris inkl. moms: </td>
<td>
<input id="ialt1" name="ialt1" type="text" value="" disabled size="20" style="text-align:right;"> </td>
</tr>
<tr>
<td colspan="3">
<input type="submit" value="Send bestilling" size="20"></td>
</tr>
</table>
</form>
</body>
</html>
