window.onload = initForms;

function initForms() {
	for (var i=0; i<document.forms.length; i++){
		document.forms[i].onsubmit = function(){
			return validForm();
		}
	}
}

function validForm(){
	var allGood = true;	
	var allTags = document.getElementsByTagName("*");
	
	for (var i=0; i<allTags.length; i++) {
		if (!validTag(allTags[i])){
			allGood = false;
		}
	}
	return allGood;
	
	function validTag(thisTag){
		var outClass = "";
		var allClasses = thisTag.className.split(" ");
		
		for (var j=0; j<allClasses.length; j++) {
			outClass += validBasedOnClass(allClasses[j]) + " ";
		}
		
		thisTag.className = outClass;
		
		if (outClass.indexOf("invalid") > -1) {
			invalidLabel(thisTag.parentNode);
			thisTag.focus();
			if (thisTag.nodeName == "INPUT") {
				thisTag.select();
			}
			return false;
		}
		return true;
		
		function validBasedOnClass(thisClass){
			var classBack = "";
			
			switch(thisClass){
				case "":
				case "invalid":
					break;
				case "reqd":
					if (allGood && thisTag.value == ""){
						classBack = "invalid ";
					}
					classBack += thisClass;
					break;
				case "radio":
					if (allGood && !radioPicked(thisTag.name)) {
						classBack = "invalid ";
					}
					classBack += thisClass;
					break;
				default:
					classBack += thisClass;
			}
			return classBack;
		}
		
		function radioPicked(radioName) {
			var radioSet = "";

			for (var k=0; k<document.forms.length; k++) {
				if (!radioSet) {
					radioSet = document.forms[k][radioName];
				}
			}
			if (!radioSet) return false;
			for (k=0; k<radioSet.length; k++) {
				if (radioSet[k].checked) {
					return true;
				}
			}
			return false;
		}
		
		function invalidLabel(parentTag){
			if (parentTag.nodeName == "LABEL"){
				parentTag.className += " invalid";
			}
		}
	}
}

<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_validateForm() { //v4.0
  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=MM_findObj(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+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\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+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}
//-->