function checkEmail(frmName, itemName, msg)
{
	str=document.forms[frmName].elements[itemName].value;
	var supported = 0;
	var valid     = 0;
	if (window.RegExp) {
		var tempStr = "a";
		var tempReg = new RegExp(tempStr);
		if (tempReg.test(tempStr)) supported = 1;
	}
	if (!supported) 
		valid=(str.indexOf(".") > 2) && (str.indexOf("@") > 0)
	else{
		var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)|(.*\")|(.*\\[|\\]|\\)|\\(|\\{|\\}|\\>|\\<|\\,|\\:|\\;|\\')|(.*\x7F)|(.*[\x01-\x20])");
		var r2 = new RegExp("^.+\\@(\\[?)(([a-zA-Z0-9\\-\\.])|([^a-zA-Z0-9]))+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");

		valid= (!r1.test(str) && r2.test(str));
		}

	if (!valid) {
		if (msg.length!=0)	
			{
				alert(msg);
				document.forms[frmName].elements[itemName].focus();
			};
		return false;
		}
	return true;
}

function checkInt(frmName, itemName, msg)
{
	if (document.forms[frmName].elements[itemName].value.length){
		var val;
		val=parseInt(document.forms[frmName].elements[itemName].value.replace(/,/g, ""));
		if (! isNaN(val)){
			document.forms[frmName].elements[itemName].value=val;
		}
		else{
			alert('Invalid '+msg);
			document.forms[frmName].elements[itemName].focus();
			document.forms[frmName].elements[itemName].select();
			return false;
		}
	}
	return true;
}
function checkNotEmpty(frmName, itemName, msg)
{
	if (document.forms[frmName].elements[itemName].value.length == 0){
		alert(msg);
		document.forms[frmName].elements[itemName].focus();
		document.forms[frmName].elements[itemName].select();
		return false;
	}
	return true;
}

function check_required(field, field_name){
	if (!field.value.length){	
		alert('Please enter '+field_name+'.');
		field.focus();
		return false;
	}
	else
		return true;
}