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Javascript文件的动态下载

function loadScript(url,callback){    var script=document.createElement("script");    script.type="text/javascript";    if(script.readyState){	script.onreadystatechange=function(){	    if(script.readyState=="loaded" || script.readyState=="complete"){		script.onreadystatechange=null;		callback();	    };	}    }else{	script.onload=function(){	    callback();    	};    };    script.src=http://www.mamicode.com/url;"head")[0].appendChild(script);};

  

Javascript文件的动态下载