<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>window.open</title><script type="text/javascript">  function Wopen(){     var myad=prompt("学生成绩");	 if(myad==90){	 document.write("优秀");	 }	 else if(myad==80){	 document.write("良好");	 }	 else{	 document.write("其他");	 }</script></head><body>    <input name="button" type="button" onClick="Wopen()" value="点击我,打开新窗口!" / ></body></html>
                    
                    
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