jQuery实现点击文本框弹出热门标签的提示效果

复制代码代码如下:
<!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实现点击文本框弹出热门标签的提示示例_网页代码站</title> 
<style type="text/css"> 
body { 
font-size:12px;font-family:Arial; 
} 
#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.webdm.cn/themes/script/jquery.js"></script> 
<script language="javascript"> 
(function ($) { 
$.fn.bgIframe = $.fn.bgiframe = function (s) { 
if ($.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)">天堂</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> 
<br /> 
<p> 
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</body> 

</html> 