js动态加载

// 加载JS文件

functionLoadJsFile(fileId,filePath){

var scriptTag =document.getElementByIdx_x(fileId);

var headObj =document.getElementsByTagName_r('head').item(0);

if(scriptTag){headObj.removeChild(scriptTag);}

jsFile =document.createElement_x('script');

jsFile.src =filePath;

jsFile.type ='text/javascript';

jsFile.id = fileId;

headObj.appendChild(jsFile);

}