function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}else{
		return true;
	}
}

function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isAlphabet(elem, helperMsg){
	var alphaExp = /^[a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isAlphanumeric(elem, helperMsg){
	var alphaExp = /^[0-9a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function stringPosRestriction(elem, first_index,last_index, check_string, helperMsg){
	var uInput = elem.value;
	if(uInput.substring(first_index,last_index) == check_string){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function lengthRestriction(elem, min, max, helperMsg){
	var uInput = elem.value;
	if(uInput.length >= min && uInput.length <= max){
		return true;
	}else{
		if (min == max) {
			alert("Please enter valid " + max + " digit " + helperMsg);
		}else{
			alert("Please enter valid " + helperMsg + " between " + min + " and " +max+ " characters");
		}
		elem.focus();
		return false;
	}
}

function madeSelection(elem, helperMsg){
	if(elem.value == "Please Choose"){
		alert(helperMsg);
		elem.focus();
		return false;
	}else{
		return true;
	}
}

function emailValidator(elem, helperMsg){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.value.match(emailExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function stringCompare(elem, elemv, helperMsg) {
	var uInput = elem.value;
	var uInputv = elemv.value;
	if(elem.value.length == 0 || (uInput.length == uInputv.length && uInput == uInputv)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function checkCheckBox(elem, helperMsg){
//if (formname.formelement.checked == false )
	if (elem.checked == true) {
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}