function getXMLDOM(xmlStr){
        var xmlDom=null;
        if(typeof window.DOMParser !='undefined'){
            xmlDom=(new DOMParser).parseFromString(xmlStr,'text/xml');
            var errors=xmlDom.getElementsByTagName('parsererror');
            if(errors.length>0){
                // alert(xmlDom)
                throw new Error('错误:'+errors[0].textContent);
            }
        }else if(typeof window.ActiveXObject !="undefined"){
            var varsion=[
                            "MSXML2.DOMDocument6.0",
                            "MSXML2.DOMDocument3.0",
                            "MSXML2.DOMDocument"
            ];
            for(var i=0;i