<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script language="javascript">
function windowEvent(oEvent)
{
if(window.event)
oEvent = window.event;
var c = document.getElementById("txt");
if(c.value == "请输入文字")
{
c.value == "";
}
else if(c.value.length < 1)
{
c.value = "请输入文字";
}
}
</script>
</head>
<body>
<form>
<input type="text" id="txt" value="请输入文字" onfocus = "windowEvent" onblur="windowEvent"/>
</form>
</body>
</html>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script language="javascript">
function windowEvent(oEvent)
{
if(window.event)
oEvent = window.event;
var c = document.getElementById("txt");
if(c.value == "请输入文字")
{
c.value == "";
}
else if(c.value.length < 1)
{
c.value = "请输入文字";
}
}
</script>
</head>
<body>
<form>
<input type="text" id="txt" value="请输入文字" onfocus = "windowEvent" onblur="windowEvent"/>
</form>
</body>
</html>
