文本框点击时文字消失,失去焦点时文字出现

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charsetGB2312" />
<title>文本框点击时文字消失,失去焦点时文字出现 练习 by 阿会楠</title>

</head>
<body>
<input type="text" value="请输入您的姓名" id="myinput" />
</body>
</html>
<script language="JavaScript" type="text/javascript">
function addListener(element,e,fn){   
    if(element.addEventListener){   
          element.addEventListener(e,fn,false);   
     } else {   
         element.attachEvent("on" + e,fn);   
     }   
}
var myinput = document.getElementById("myinput");
addListener(myinput,"click",function(){
myinput.value = "";
})
addListener(myinput,"blur",function(){
myinput.value = "请输入您的姓名";
})

</script>

你可能感兴趣的:(html)