HTML DOM focus()和blur()方法 输入框鼠标指过自动消失鼠标离开显示 jshttp://blog.csdn.net/zyxlinux888/
HTML DOM focus()和blur()方法 输入框鼠标指过自动消失鼠标离开显示 js
http://blog.csdn.net/zyxlinux888/article/details/7391240
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实例2：
<!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>Untitled Document</title>
<script type="text/javascript">
?????? function chg(){
??? ?? document.getElementById("setfocus").value="";
?????? }
??? ?? function newChg(){
??? ?? document.getElementById("setfocus").value="请输入关键字";
?????? }
</script>
</head>
<body>
<input type="text" name="name" size="15" id="setfocus" value="请输入关键字" onfocus="chg()" onblur="newChg()">
</body>
</html>
实例3<!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>Untitled Document</title>
<script type="text/javascript">
function $(ID) {return document.getElementById(ID);}
function chg(){
$("setfocus").value="";
}
function newChg(){
??? if($("setfocus").value==""){
??? ??? $("setfocus").value="请输入关键字";
??? ??? }
??? else{return $("setfocus").value }
}
</script>
</head>
<body>
<input type="text" name="name" size="15" id="setfocus" value="请输入关键字" onfocus="chg()" onblur="newChg()">
</body>
</html>
