javascript getElementByTagName的使用

时间:2020-05-12 人气:0

<!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() 
{ 
/https://img.qb5200.com/download-x/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> 
<a href="https://m.qb5200.com/articlehttps://img.qb5200.com/download-x/ddd" class="dd1">dfdfd</a> 
<a href="https://m.qb5200.com/articlehttps://img.qb5200.com/download-x/ddd" class="dd1">dfdfd</a> 
<a href="https://m.qb5200.com/articlehttps://img.qb5200.com/download-x/ddd" class="dd1">dfdfd</a> 
</div> 
</body> 
</html>

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