ajax跨域

<script type="text/javascript">
/* 
    版本: 2008-12-24
    作用: 脚本跨域函数
必填参数: script_e, path_s, callback_f
*/
function script_cross_domain_f(script_e, path_s, callback_f)
{/* shawl.qiu，void return，func:none */
  if(typeof script_e==='string'){ script_e = document.getElementById(script_e); }
  if(!script_e){ document.body.appendChild( script_e = document.createElement('script') ); }
  if(!callback_f){ callback_f = function(){} };
 
  script_e.onload =
  function()
  {
    callback_f()
  }
 
  script_e.onreadystatechange =
  function()
  {
    if(script_e.readyState=='loaded')
    {
      callback_f()
    }
  } 
  script_e.src = path_s;
}
</script>

<script type="text/javascript">

script_cross_domain_f
(
  'cross_domain_e'
  , 'http://www.xxx.com/visit.jsp?companySiteName=liuwei'
  , function()
    {
      alert( "OK" )
    }
);
</script>