// JavaScript Document

function is_numeric(expression)
{
	var nums = "0123456789";
	
	if (expression.length==0) return(false);
	for (var n=0; n < expression.length; n++)
	{
		if(nums.indexOf(expression.charAt(n))==-1)return(false);
	}
	return(true);
}

function checkemail(str)
{
	if (str.length==0) return(false);
	//var str=document.validation.emailcheck.value
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (filter.test(str))
		return true;
	else
	{
		//alert("Please input a valid email address!")
		return false;
	}
}