表单JS弹出填写提示效果代码

HTML

<form id="form1" runat="server"> 
<div> 
<div style="margin-top:100px"> 
<asp:TextBox ID="TextBox1" runat="server" HintTitle="增加的内容信息标题" HintInfo="控制在100个字数内，标题文本尽量不要太长。"></asp:TextBox></div> 
</div> 
</form>

页面中的样式

<style type="text/css"> 
.focus 
{ 
border: 1px solid #FC0 !important; 
background: url(Admin/Images/focus_bg.jpg) repeat-x !important; 
color: #00F !important; 
} 
/*提示文字样式*/ 
#HintMsg 
{ 
width: 271px; 
position: absolute; 
display: none; 
} 
#HintMsg .HintTop 
{ 
height: 9px; 
background: url(Admin/Images/hintbg1.gif) no-repeat; 
overflow: hidden; 
} 
#HintMsg .HintInfo 
{ 
padding: 0 5px; 
border-left: 1px solid #000; 
border-right: 1px solid #000; 
background: #FFFFE1; 
line-height: 1.5em; 
} 
#HintMsg .HintInfo b 
{ 
display: block; 
margin-bottom: 6px; 
padding-left: 15px; 
background: url(Admin/Images/hint.gif) left center no-repeat; 
height: 13px; 
line-height: 16px; 
} 
#HintMsg .HintInfo b span 
{ 
display: block; 
float: right; 
text-indent: -9999px; 
background: url(Admin/Images/close.gif) no-repeat; 
width: 12px; 
height: 12px; 
cursor: pointer; 
} 
#HintMsg .HintFooter 
{ 
height: 22px; 
background: url(Admin/Images/hintbg2.gif) no-repeat; 
} 
</style>

关键JS

$(function() { 
$(".input,.login_input,.textarea").focus(function() { 
$(this).addClass("focus"); 
}).blur(function() { 
$(this).removeClass("focus"); 
}); 
//输入框提示,获取拥有HintTitle,HintInfo属性的对象 
$("[HintTitle],[HintInfo]").focus(function(event) { 
$("*").stop(); //停止所有正在运行的动画 
$("#HintMsg").remove(); //先清除，防止重复出错 
var HintHtml = "<ul id=\"HintMsg\"><li class=\"HintTop\"></li><li class=\"HintInfo\"><b>" + $(this).attr("HintTitle") + "</b>" + $(this).attr("HintInfo") + "</li><li class=\"HintFooter\"></li></ul>"; //设置显示的内容 
var offset = $(this).offset(); //取得事件对象的位置 
$("body").append(HintHtml); //添加节点 
$("#HintMsg").fadeTo(0, 0.85); //对象的透明度 
var HintHeight = $("#HintMsg").height(); //取得容器高度 
$("#HintMsg").css({ "top": offset.top - HintHeight + "px", "left": offset.left + "px" }).fadeIn(500); 
}).blur(function(event) { 
$("#HintMsg").remove(); //删除UL 
}); 
});

效果图：




以上内容来子一个下载的网站,具体的名字忘记了....仅作参考
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