页面加载完时再动态添加脚步

//页面加载时不存在，加载完时再添加
function loadScript(url) {//外部文件var script = document.createElement("script");script.type = "text/javascript";script.src = url;document.body.appendChild(script);
}function loadScriptString(code) {//行内样式var script = document.createElement("script");script.type = "text/javascript";try {script.appendChild(document.createTextNode(code));} catch (ex) {script.text = code;}document.body.appendChild(script);
}