设置他的value值为匿名,当鼠标焦点进入是清空,鼠标焦点离开时,如果没有输入任何内容,就给他赋值为匿名:
给你例子,慢慢看
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>demo01</title>
<script>
window.onload=function()
{
var oTxt1=document.getElementById('txtName');
oTxt1.onfocus=function()
{
this.value='';
}
oTxt1.onblur=function()
{
if(this.value=='')
{
this.value='匿名';
}
}
}
</script>
</head>
<body>
<form action="#" method="post">
<input type="text" name="txtName" id="txtName" value="匿名"/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
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