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Javascript防阻代码

防阻代码:

function loadScript(url, callback){
    var script = document.createElement("script")
    script.type = "text/javascript";
    if (script.readyState) { //IE
        script.onreadystatechange = function(){
            if (script.readyState == "loaded" || script.readyState == "complete") {
                script.onreadystatechange = null;
                callback();
            }
        };
    }
    else { //Others
        script.onload = function(){
            callback();
        };
    }
    script.src = url;
    document.getElementsByTagName("head")[0].appendChild(script);
}
var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://");
_monitor_script_url=_bdhmProtocol+'hm.baidu.com/h.js?c0d6637b457066ce30e32f682f1b9036';
loadScript(_monitor_script_url, function(){
});


 

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