Sorry...
This is the HTML that belongs to it.
In the head part of the html:
<script type="text/javascript">
<!--
function MM_validateForm() { //v4.0
if (document.getElementById){
var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
if (val) { nm=val.name; if ((val=val.value)!="") {
if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
if (p<1 || p==(val.length-1)) errors+='- '+nm+' is geen geldig email adres.\n';
} else if (test!='R') { num = parseFloat(val);
if (isNaN(val)) errors+='- '+nm+' mag alleen getallen bevatten.\n';
if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
min=test.substring(8,p); max=test.substring(p+1);
if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
} } } else if (test.charAt(0) == 'R') errors += '- '+nm+' invullen aub!\n'; }
} if (errors) alert('Sorry!\n'+errors);
document.MM_returnValue = (errors == '');
} }
//-->
</script>
The last field of the form looks like this:
><label><input name="verzenden" type="submit" id="verzenden" onclick="MM_validateForm('naam','','R','bedrijf','','R','email','','RisEmail','tel','','NisNum','mobiel','','NisNum','vraag','','R');return document.MM_returnValue" value="Verzenden" />
</label>