<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
<title>webkfa.com</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.0/jquery.min.js"></script>
</head>
<body>
<div>
是否有div
</div>
<script type="text/javascript">
function isyoudivma(){
//$("div").length > 0 或 $("div").size() > 0
return $("div").length > 0;
}
if(isyoudivma()){
alert('页面有div');
}else{
alert('页面没有div');
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
<title>webkfa.com</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.0/jquery.min.js"></script>
</head>
<body>
<div>
是否有div
</div>
<script type="text/javascript">
function isyoudivma(){
//$("div").length > 0 或 $("div").size() > 0
return $("div").length > 0;
}
if(isyoudivma()){
alert('页面有div');
}else{
alert('页面没有div');
}
</script>
</body>
</html>