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這么寫(xiě)還有優(yōu)化的空間嗎

<!DOCTYPE html>

<html>

?<head>

? <title> new document </title>??

? <meta http-equiv="Content-Type" content="text/html; charset=gbk"/>? ?

? <script type="text/javascript">??

? ? // 新窗口打開(kāi)時(shí)彈出確認(rèn)框，是否打開(kāi)

? ? function openWindow(){

? ? var message=confirm("是否打開(kāi)新網(wǎng)頁(yè)？");

? ? if(message==true)

? ? {

? ? window.open('http://idcbgp.cn','_blank','width=400，height=500,top=100,left=0,toolbar=no,menubar=no');

? ? }

? ? else

? ? {

? ? ? ? return null;

? ? }

? }? ??

? </script>?

?</head>?

?<body>?

? <input type="button" value="新窗口打開(kāi)網(wǎng)站" onclick="openWindow()" />?

?</body>

</html>

無(wú)龑

2019-11-04

源自：JavaScript入門(mén)篇 2-7

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慕仙9347523
2019-11-13

function?openWindow(){
????????var?Message?=?confirm("Are?you?sure?want?to?open?a?site?");
????????if(Message?==?true){
????????????var?URL?=?prompt("Enter?an?url?to?open","http://idcbgp.cn/")
????????????while?(URL?===?""){
????????????????alert("Please?enter?an?url");
????????????????var?URL?=?prompt("Enter?an?url?to?open","http://idcbgp.cn/");
????????????????}
????????????????if?(URL?!=?null)?{
????????????????????window.open(URL,"_blank","width=400,height=500,menubar=no,toolbar=no");
????????????????}?else?{
????????????????????return;
????????????????}
????????}?else?{
????????????return;
????????}
????}