function LTrim(sString){
	while (sString.substring(0,1) == ' ')
	{
		sString = sString.substring(1, sString.length);
	}
	return sString;
}
function RTrim(sString){
	while (sString.substring(sString.length-1, sString.length) == ' ')
	{
		sString = sString.substring(0,sString.length-1);
	}
	return sString;
}
function Trim(sString){
	sString = LTrim(sString);
	sString = RTrim(sString);
	return sString;
}
function IsEmail(email){
	var regx=new RegExp("^[\\w\.=-]+@[\\w\\.-]+\\.[a-zA-Z]{2,4}$");
    return regx.test(email);
}