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分享<script type="text/javascript">
function document_divClass(c_name,n,c_str){
var div_document = document.getElementsByTagName("div");
var c_n = 0;
for(i=0;i<div_document.length;i++){
if(div_document[i].className == c_name){
c_n = c_n + 1;
if(c_n == n){
div_document[i].innerHTML = c_str;
}
}
}
}
</script>
c_name:div的class名称;n:该class是第几个(存在同名的class时表明,如果没有同名的class则n为1);c_str:向div中写入的字符串;
实例:
<!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>无标题文档</title>
<script type="text/javascript">
function document_divClass(c_name,n,c_str){
var div_document = document.getElementsByTagName("div");
var c_n = 0;
for(i=0;i<div_document.length;i++){
if(div_document[i].className == c_name){
c_n = c_n + 1;
if(c_n == n){
div_document[i].innerHTML = c_str;
}
}
}
}
</script>
</head>
<body>
<div class="a">1a</div>
<div class="a">2a</div>
<div class="b">1b</div>
<div class="b">2b</div>
<div class="b">3b</div>
<div class="b">4b</div>
<script type="text/javascript">document_divClass('b',3,'我和你')</script>
</body>
</html>