<?php
  header(\'Content-Type: text/html;charset=utf-8\');
  setcookie(\'cok\',"我是cookie",time()+360000);
?>
<script>
function $_COOKIE(sName){
   var aCookie = document.cookie.split("; ");
   for (var i=0; i < aCookie.length; i++){
        var aCrumb = aCookie[i].split("=");

        if (encodeURIComponent(sName) == aCrumb[0])
        return decodeURIComponent(aCrumb[1]);
  }
  return null;
}
alert($_COOKIE(\'cok\'));


function GetUrlParam( paramName ){
    var aCookie = document.cookie;
    var oRegex = new RegExp(paramName + \'=([^;]+)\', \'i\' ) ;
    //var oRegex = new RegExp( \'[\\?&]\' + paramName + \'=([^&]+)\', \'i\' ) ;
    //var oMatch = oRegex.exec( window.top.location.search ) ;
    //var oMatch = oRegex.exec( window.top.location.search ) ;
    var oMatch = oRegex.exec( aCookie ) ;

    if ( oMatch && oMatch.length > 1 )
        return decodeURIComponent( oMatch[1] ) ;
    else
        return \'\' ;
}
这个函数大家应该很熟悉吧，fckeditor里面的。可谓经典呀。当然，也可以参看：取得URL中的参数

alert(GetUrlParam(\'cok\'));
</script>