<!doctype html>
<html>
<head>
    <title></title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
    <style type="text/css">
        #divTips{
            filter:alpha(opacity=30); /*IE濾鏡，透明度50%*/
            -moz-opacity:0.3; /*Firefox私有，透明度50%*/
            opacity:0.3;/*其他，透明度50%*/
            position: absolute;width: 600px; height: 400px;display:none;color:red;z-index:10;padding:10px;
        }
    </style>
    <script type="text/javascript">
        $(function () {
            var $txtNote = $("#txtNote");
            var $divTips = $("#divTips");
            $txtNote.focus(function () {
                //置焦點(diǎn)時(shí)隱藏
                $divTips.hide();
            }).blur(function () {
                //離開時(shí)， 如果為空則顯示，否則隱藏. 然后定位
                $divTips.toggle($txtNote.val() == "")
                    .css({
                        "left": $txtNote.position().left,
                        "top" : $txtNote.position().top
                    });
            });
            $divTips.click(function () {
                $txtNote.focus();
            });
            $txtNote.blur();
        });
    </script>
</head>
<body>
    留言板<br />
    <textarea id="txtNote" style="width: 600px; height: 400px;"></textarea>
    <div id="divTips">
        親，歡迎訪問，有什么說的就寫下來吧!!<br />
        (在下面的框框中留下您的name, 方便的話請(qǐng)留下您的聯(lián)系方式)
    </div><br />
    <input type="text" value="姓名" />&nbsp;<input type="text" value="手機(jī)/QQ/……" />
</body>
</html>