function notEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); 
		return false;
	}
	return true;
}
function isRadioChecked(aRadio, helperMsg) {
	var iLength = aRadio.length;
	var test = false;
	for (i=0;i<iLength;i++) {
		if (aRadio[i].checked == true)
			test = true;
	}
	if(test == false){
		alert(helperMsg);
		return false;
	}
	return true;
}
function isLngth(elem, helperMsg, lngth){
	if(elem.value.length > lngth){
		alert(helperMsg);
		return false;
	}
	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 checkTextLength(obj,lngth){
	if( obj.value.length > lngth ){
		obj.value = obj.value.substr(0,lngth);
	}
}