var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i;
function $() {
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}

function isAlphaNum(myobj){
	if(myobj.value.match(/^\w+$/)){
		return true;
	}
	alert ("Value should be alpha-numeric");
	myobj.focus();
	return false;
}

function isNum(myobj){
/*****************************************************************
DESCRIPTION: Validates that a string contains only valid numbers.
PARAMETERS: strValue - String to be tested for validity
RETURNS: True if valid, otherwise false.
******************************************************************/
	var objRegExp  =  /(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/;
	if (objRegExp.test(myobj.value)) {
		return true;
	} else {
		alert ("Value should be numeric");
		myobj.focus();
		return false;
	}
}