//--------------------
//获取对象id
//--------------------
function $id(id)
{
	return document.getElementById(id);
}
//--------------------
//去掉开头结尾的空白字符窜
//--------------------
function trim(s)
{
  while (s.substring(0,1) == ' ') {
    s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
    s = s.substring(0,s.length-1);
  }
  return s;
}
//--------------------
//登入时获取屏幕宽度
//--------------------
function check(){
	$id("brower_width").value=window.screen.width;
}