function trim(s) 
{
	while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r'))
	{ s = s.substring(1,s.length); }
     
	while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r'))
	{ s = s.substring(0,s.length-1); }
     
	return s;
}

function isEmail(str)
{
	var supported = 0;
	if (window.RegExp) 
	{
		var tempStr = "a";
		var tempReg = new RegExp(tempStr);
		if (tempReg.test(tempStr)) supported = 1;
	}
	if (!supported) 
		return (str.indexOf(".") > 2) && (str.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(str) && r2.test(str));
}

function text_length(objSource, objTarget)
{
	var obj1 = document.getElementById(objSource); // Text Container
	var obj2 = document.getElementById(objTarget); // Count of Text
	if (obj1!=null && obj2!=null) {
		if (obj1.value.length > 500)
		{
			obj1.value = String(obj1.value).substring(0,500);
			obj2.value = 0;
		}
		else
		{
			obj2.value = 500 - obj1.value.length;
		}
	}
}