js.php echo ' <br /> function addScript(){<br /> var script = document.createElement("script");<br /> script.setAttribute("type","text/javascript");<br /> script.setAttribute("src","123.js");<br /> var hd = document.getElementsByTagName("head")[0];<br /> hd.appendChild(script);<br /> } <br /> '; ?> 123.js alert("addddddddddd");