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基于jQuery的表单提示特效，点击文本框后会出现一些热门的标签供选择，类似于下拉框提示，了解了如何实现的这一效果，你就可很好的改变提示的内容了。
效果图如下：
代码如下：
<!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>
<title>jQuery提示示例：点击文本框弹出热门标签</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<style type="text/css">
body {
font-size:12px;
}
#m_tagsItem {
background:#fff;
position:absolute;
top:0px;
left:0px;
overflow:hidden;
width:590px;
*width:561px;
width:561px\9;
padding:10px;
border:1px solid #ccc;
z-index:1000;
display:none;
}
#m_tagsItem p {
text-align:left;
line-height:22px;
padding:2px 0;
margin:0;
border:0;
}
#m_tagsItem span {
font-weight:bold;
}
#m_tagsItem a {
margin:0 5px;
}
.m_tagsname {
color:#999;
vertical-align:middle;
font-size:12px;
text-indent:3px;
line-height:20px;
}
#tagClose {
font-size:12px;
color:#888;
cursor:pointer;
position:absolute;
top:2px;
right:2px;
}
</style>
<script src="http://www.codefans.net/ajaxjs/jquery1.3.2.js"></script>
<script language="javascript">
//Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net)
(function($){
$.fn.bgIframe = $.fn.bgiframe = function(s) {
// This is only for IE6
if ( $.browser.msie && /6.0/.test(navigator.userAgent) ) {
s = $.extend({
top : 'auto', // auto == .currentStyle.borderTopWidth
left : 'auto', // auto == .currentStyle.borderLeftWidth
width : 'auto', // auto == offsetWidth
height : 'auto', // auto == offsetHeight
opacity : true,
src : 'javascript:false;'
}, s || {});
var prop = function(n){return n&&n.constructor==Number?n+'px':n;},
html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+
'style="display:block;position:absolute;z-index:-1;'+
(s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+
'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+
'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+
'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+
'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+
'"/>';
return this.each(function() {
if ( $('> iframe.bgiframe', this).length == 0 )
this.insertBefore( document.createElement(html), this.firstChild );
});
}
return this;
};
})(jQuery);
jQuery.fn.selectCity = function(targetId) {
var _seft = this;
var targetId = $(targetId);
this.click(function(){
var A_top = $(this).offset().top + $(this).outerHeight(true); // 1
var A_left = $(this).offset().left;
targetId.bgiframe();
targetId.show().css({"position":"absolute","top":A_top+"px" ,"left":A_left+"px"});
});
targetId.find("#tagClose").click(function(){
targetId.hide();
});
$(document).click(function(event){
if(event.target.id!=_seft.selector.substring(1)){
targetId.hide();
}
});
targetId.click(function(e){
e.stopPropagation(); // 2
});
return this;
}
$(function(){
$("#selecttags").selectCity("#m_tagsItem");
});
//为文本域连续赋值
function checktag(o){
var tagid = function(id){return document.getElementById(id);}
var tags = [];//存放标签,避免重复加入
var tagidSPLITCHAR = ' ';//设定分隔符,根据程序需求可改
var d = tagid('selecttags');
if (d.value)
tags = d.value.split(tagidSPLITCHAR);
var v = o.innerHTML;//如果tag有别的值或者别的非innerHTML里体现的内容
var s = tagidSPLITCHAR+tags.join(tagidSPLITCHAR)+tagidSPLITCHAR
if (!new RegExp(tagidSPLITCHAR+v+tagidSPLITCHAR,'g').test(s)){
s+=v;
}
s = s.replace(new RegExp("(^"+tagidSPLITCHAR+"*|"+tagidSPLITCHAR+"*tagid)","g"),'');
d.value = s;
tags = s.split(tagidSPLITCHAR);
}
</script>
</head>
<body>
如果没有出现提示框请刷新一下页面再试~
<input type="text" id="selecttags" name="m_tagsname" class="m_tagsname" style="width:577px" value="点击查看热门标签和您曾经使用过的标签" onClick="if(this.value=='点击查看热门标签和您曾经使用过的标签'){this.value='';this.className='m_tagsname'}">
<div id="m_tagsItem" style="display:none">
<div id="tagClose">关闭</div>
<p><span>温馨提示：</span>标签间请用“空格”、“逗号”或“分号”隔开，用简练的词语概括您的博文内容。</p>
<p><span>热门标签：</span><a href="javascript:void(0)" onClick="checktag(this)">彩妆</a><a href="javascript:void(0)" onClick="checktag(this)">美发</a><a href="javascript:void(0)" onClick="checktag(this)">美优博客</a><a href="javascript:void(0)" onClick="checktag(this)">aaa</a><a href="javascript:void(0)" onClick="checktag(this)">bbb</a><a href="javascript:void(0)" onClick="checktag(this)">学IT网</a><a href="javascript:void(0)" onClick="checktag(this)">xueit.com</a><a href="javascript:void(0)" onClick="checktag(this)">eee</a><a href="javascript:void(0)" onClick="checktag(this)">fff</a><a href="javascript:void(0)" onClick="checktag(this)">ggg</a></p>
<p><span>您使用过的标签：</span><a href="javascript:void(0)" onClick="checktag(this)">软件</a><a href="javascript:void(0)" onClick="checktag(this)">Delphi</a><a href="javascript:void(0)" onClick="checktag(this)">博客</a><a href="javascript:void(0)" onClick="checktag(this)">源码</a><a href="javascript:void(0)" onClick="checktag(this)">彩妆</a><a href="javascript:void(0)" onClick="checktag(this)">google</a><a href="javascript:void(0)" onClick="checktag(this)">新浪</a></p>
</div>
</body>
</html> |
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