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<script text="text/javascript">
function ajax(){
var httpRequest;
if(windows.httpRequest){
httpRequest = new HttpRequest();
}else{
httpRequest = new ActiveXObject("Microsoft.XMLHTTP");//IE6、7
}
httpRequest.send(url,true);//第二个参数为是否异步
}
</script>
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原文地址:http://www.cnblogs.com/luoxiaolei/p/5090052.html