javascript getElementByTagName的使用_javascript技巧
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2022-04-30 20:58:01
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javascript getElementByTagName的使用_javascript技巧
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>javascript getElementByTagName的使用</title>
<style type="text/css">
.dd1{ color:#FF0000;
}
.dd2{ color:blue;
}
</style>
<script type="text/javascript">
function changeColor()
{
//document.getElementById("s1").getElementsByTagName("a").className="dd2";
var obj1,num,i;
obj1=document.getElementById("s1").getElementsByTagName("a");
num=document.getElementById("s1").getElementsByTagName("a").length;
for (i=0;i<num;i++)
{
obj1[i].className="dd2";
}
}
</script>
</head>
<body>
<div id="s1" onmouseover="changeColor()">
<a href="ddd" class="dd1">dfdfd</a>
<a href="ddd" class="dd1">dfdfd</a>
<a href="ddd" class="dd1">dfdfd</a>
</div>
</body>
</html>
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