js小技巧(输入框提示信息自动消失)

<!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=utf-8" />
<title>无标题文档</title>
</head>
<script type="text/javascript">
	var defaultValue = '请阐述您的理由';
</script>
<body>
<textarea onfocus="if(this.value==defaultValue)this.value=''" onblur="if(this.value=='')this.value=defaultValue" id="">请阐述您的理由</textarea>
</body>
</html>
posted @ 2011-11-03 10:39  科学家会武术  阅读(444)  评论(0编辑  收藏  举报