<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8">
<title>無標(biāo)題文檔</title>
<style?type="text/css">
????#div1{width:200px;height:30px;background-color:red;}
????#div2{width:150px;?height:20px;background-color:gray;margin-top:10px;display:none;}
</style>
<script?type="text/javascript">
????window.onload?=?function?()?{
????????var?div1?=?document.getElementById("div1");
????????var?div2?=?document.getElementById("div2");
????????var?timer?=?null;
????????function?show()?{
????????????div2.style.display?=?"block";
????????????clearTimeout(timer);
????????}
????????function?hide()?{
????????????timer?=?setTimeout(function?()?{?div2.style.display?=?"none";?},?300);
????????}
????????div1.onmouseover?=?show;
????????div1.onmouseout?=?hide;
????????div2.onmouseover?=?show;
????????div2.onmouseout?=?hide;
????}
</script>
</head>
<body>
<div?id="div1"></div>
<div?id="div2"></div>
</body>
</html>????????div1.onmouseover?=?show;
????????div1.onmouseout?=?hide;
????????div2.onmouseover?=?show;
????????div2.onmouseout?=?hide;為啥我要是寫成div1.onmouseover?=?show();
??????????????????????????????????????????????div1.onmouseout?=?hide();
??????????????????????????????????????????????div2.onmouseover?=?show();
??????????????????????????????????????????????div2.onmouseout?=?hide();就不行呢？函數(shù)的調(diào)用不得加上后面的括號嗎？求解答
關(guān)于函數(shù)的調(diào)用疑問
天窗的螞蟻
2016-03-05 22:26:35
