So I found a standard MM_validateForm() java script function and modified it to do the job.
Here is java script function:
- Code: Select all
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.id;
if(val != null && test=='checked')
{
if(!val.checked)
errors += '- '+'Please confirm agreement to the Terms of Service.\n';
}
if ((val=val.value)!="") {
if (test.indexOf('isEmail')!=-1) { p=isEmail(val);
if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain a valid e-mail address.\n';
} else if (test!='R') { num = parseFloat(val);
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+' is required.\n'; }
} if (errors) alert('The following error(s) occurred:\n'+errors);
document.MM_returnValue = (errors == '');
} }
And here is what the html forum submit input looks like:
- Code: Select all
<input type="image" id="submit" src="images/submit.gif" onclick="MM_validateForm('OptIn','','checked','s','','RisEmail','p','','R');return document.MM_returnValue" value="Submit" />
This is assuming you have an input field called "Optin".
