var is_ie=( /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent) );
var is_opera = /opera/i.test(navigator.userAgent);
function displayctl(ctl,dis)
{
	if (is_ie)
	{
		if (dis==true)
		{
			ctl.style.visibility="";
		}
		else
		{
			ctl.style.visibility="hidden";
		}
	}
	else
	{
		if (dis==true)
		{
			ctl.style.display="";
		}
		else
		{
			ctl.style.display="none";
		}
	}
}
function IsNumber(Expression)
{
	Expression = Expression.toLowerCase();
	RefString = "0123456789.-";

	if (Expression.length < 1) 
		return (false);

	for (var i = 0; i < Expression.length; i++) 
	{
		var ch = Expression.substr(i, 1)
		var a = RefString.indexOf(ch, 0)
		if (a == -1)
			return (false);
	}
	return(true);
}
function IsEmail(Expression)
{
	if (Expression == null)
		return (false);

	var supported = 0;
	if (window.RegExp)
	{
		var tempStr = "a";
		var tempReg = new RegExp(tempStr);
		if (tempReg.test(tempStr)) supported = 1;
	}
	if (!supported) 
		return (Expression.indexOf(".") > 2) && (Expression.indexOf("@") > 0);
	var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
	var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	return (!r1.test(Expression) && r2.test(Expression));
}
function InStr(String1, String2)
{
	var a = 0;
	if (String1 == null || String2 == null || String1==undefined)
	{
		return 0;
	}
	else
	{
		String1 = String1.toLowerCase();
		String2 = String2.toLowerCase();

		a = String1.indexOf(String2);
		if (a == -1)
			return 0;
		else
			return a + 1;	
	}
}