function getJsFile(url, callBack){
var XH = window.XMLHttpRequest ? new XMLHttpRequest : new ActiveXObject('Msxml2.XMLHTTP');
XH.open('get',url,true);
XH.onreadystatechange = function(){
if(XH.readyState == 4 && XH.status == 200){
if(window.execScript) window.execScript(XH.responseText);
else eval.call(window, XH.responseText);
eval(callBack)();
}
}
XH.send('');
}