// JavaScript Document

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) {
			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 "email":
					if(allGood && !validEmail(thisTag.value)) {
						classBack = "invalid ";
					}
					classBack += thisClass;
					break;
				default:
					classBack += thisClass;
			}
			return classBack;
			
			function validEmail(email) {
				var invalidChars = " /:,;";
				
				if (email == "") {
					return false;	
				}
				for (var k=0; k<invalidChars.length; k++) {
					var badChar = invalidChars.charAt(k);
					if (email.indexOf(badChar) > -1) {
						return false;
					}
				}
				var atPos = email.indexOf("@",1);
				if (atPos == -1){
					return false;
				}
				if (email.indexOf("@",atPos+1) != -1) {
					return false;				  
				}
				var periodPos = email.indexOf(".",atPos);
				if (periodPos == -1){
					return false;
				}
				if (periodPos+3 > email.length) {
					return false;
				}
				return true;
			}
			
			
		}
	}
}