js简单地发送一个请求

var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp=new XMLHttpRequest();
} else {// code for IE6, IE5
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
                        xmlhttp.onreadystatechange=function() {
    if (xmlhttp.readyState==4 && xmlhttp.status==200) {
    document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
    }
}

var urlstring = "http://test.jms.jimaisong.com/jms.do?m=infotimes&rid="+rid+"&cid="+cid;
xmlhttp.open("GET", urlstring, true);
xmlhttp.send();