String.prototype.trim = 
	function()
	{
		var str = this;
		str = str.replace(/^[ กก]+/, '');		
		str = str.replace(/[ กก]+$/, '');			
		return str;
	}
function GetStringLength(string)
{		
	var l = 0;
	for(var i=0; i<string.length; i++)
	{
		var c = string.charCodeAt(i);		
		l += (c < 256 || (c >= 0xff61 && c <= 0xff9f))? 1:2;
	}
	return l;
}