//<![CDATA[
		   //登陆
//去左空格; 
function ltrim(s){ 
return s.replace( /^\s*/, ""); 
} 
//去右空格; 
function rtrim(s){ 
return s.replace( /\s*$/, ""); 
} 
//去左右空格; 
function trim(s){ 
return rtrim(ltrim(s)); 
}
//简化函数
function $(id) {
	itm = null;
	if (document.getElementById) {
		itm = document.getElementById(id);
	} else if (document.all)	{
		itm = document.all[id];
	} else if (document.layers) {
		itm = document.layers[id];
	}
	return itm;
}
//]]>