addOnload(initForms);

//Form Validation functions
function initForms() {
	if (document.getElementById('submitForm')) {
		
	var form = document.getElementById('submitForm');
	form.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 ";
					document.getElementById("formerror").style.visibility = 'visible';
					document.getElementById("formerror").innerHTML = 'This field is required.';}
					classBack += thisClass;
					break;
				case "isNum":
					if (allGood && !isNum(thisTag.value)) {classBack = "invalid ";
					document.getElementById("formerror").style.visibility = 'visible';
					document.getElementById("formerror").innerHTML = 'This field must be a number.';}
					classBack += thisClass;
					break; 
				case "email":
					if (allGood && !validEmail(thisTag.value)) {classBack = "invalid ";
					document.getElementById("formerror").style.visibility = 'visible';
					document.getElementById("formerror").innerHTML = 'This field is an invalid email format.';}
					classBack += thisClass;
					break;
				default:
					classBack += thisClass;
			}
			return classBack;
		}
		
		function isNum(passedVal) {
			
			var invalidChars = "/:,;";
			
			for (var k=0; k<invalidChars.length; k++) {
				var badChar = invalidChars.charAt(k);
				if (passedVal.indexOf(badChar) > -1) {
					return false;
				}
			}
				
			var validChars = " ()+-";
			
			for (var k=0; k<validChars.length; k++) {
				var goodChar = validChars.charAt(k);
				if (passedVal.indexOf(goodChar) > -1) {
					return true;
				}

			}
				
			for (var k=0; k<passedVal.length; k++) {
				if (passedVal.charAt(k) < "0") {
					return false;
				}
				if (passedVal.charAt(k) > "9") {
					return false;
				}
				
			}
			
				return true;
			
			
		}
		
		function validEmail(email) {
			var invalidChars = " /:,;";
			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;
		}


	}
}