function IsEmail(sEmail)
	{
		var emailChk = "@";
		if (sEmail.indexOf(emailChk) < 0 || sEmail.indexOf(emailChk) != sEmail.lastIndexOf(emailChk))
		{
			return false;
		}
		else
		{
			return true;
		}
	}
function trim(str)
	{
		var sTrim ; 
		var sTrim = "" + str.toString() ; // alternative using regular expressions
		sTrim = sTrim.replace(/^[\s]+/g,''); // leading whitespace -> null
		sTrim = sTrim.replace(/[\s]+$/g,''); // trailing whitespace -> null
		sTrim = sTrim.replace(/[\s]{2,}/g,' '); //multiple whitespace -> space
		return sTrim;
	}