ajaxµÄÎÊÌâ

function createXMLHTTP()          //³õʼ»¯AJAX ¶ÔÏó
{

http_request = false;

if (window.XMLHttpRequest) {
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType('text/xml');//ÐÞ¸Äheader
}
} else if (window.ActiveXObject) { // Åж¨ä¯ÀÀÆ÷ÊÇ IE
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}

if (!http_request) {//³õʼ»¯xmlhttp×é¼þ
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
return http_request;
}

function trim(str)  //È¥2±ß¿Õ¸ñº¯Êý
{
  return str.replace(/(^\s*)|(\s*$)/g,"");
}

function mzrui_login()  //ºǫ́µÇ¼
{
var check_safe=document.forms["check_safe"];
var http_request=createXMLHTTP();
var str1=escape(check_safe.mzrui_name.value);
var str2=escape(check_safe.mzrui_pass.value);
if(str1 == "" || str2 == "")
{
alert("ÇëÊäÈëÓû§Ãû»òÃÜÂë");
}
else
{
var url=('ajax.php?action=mzrui_login&name='+str1+'&am