Ajax在IE中工作，但不是chrome

Question

function chrpajaxscri( formmeth, phpurl ) {

    var x = new XMLHttpRequest();

    x.open( formmeth, phpurl, true );

    x.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

    return x;

}

function ajaxReturn(x){

    if(x.readyState == 4 && x.status == 200){

       return true; 
    }
}

function chrpsendemail(x,p,e,id,upd,to){

    var name = document.getElementById(id).value;

    var email = document.getElementById(e).value;

    if (name != ""){

        document.getElementById(upd).innerHTML = "Please wait sending ...";

        var ajax = chrpajaxscri("POST", x);

        ajax.onreadystatechange = function (){

           if(ajaxReturn(ajax) == true) {

                document.getElementById(upd).innerHTML = ajax.responseText;

        }

    }

    ajax.send("product="+p+"&email="+email+"&name="+name+"&to="+to);

    }
}

上面是我用来向另一个文件发送请求的代码，但这适用于除谷歌浏览器以外的所有浏览器。从我可以告诉它的铬的错误，但我仍然需要一个修复可以任何人帮助请