<script type="text/javascript" src="jquery-1.7.2.min.js"></script> 
<script type="text/javascript" src="jquery.qqFace.js"></script> 

<div id="show"></div> 
<div class="comment"> 
 <div class="com_form"> 
  <textarea class="input" id="saytext" name="saytext"></textarea> 
  <p><span class="emotion">表情</span><input type="button" class="sub_btn" value="提交"></p> 
 </div> 
</div> 

.comment{width:680px; margin:20px auto; position:relative} 
.comment h3{height:28px; line-height:28px} 
.com_form{width:100%; position:relative} 
.input{width:99%; height:60px; border:1px solid #ccc} 
.com_form p{height:28px; line-height:28px; position:relative} 
span.emotion{width:42px; height:20px; background:url(icon.gif) no-repeat 2px 2px; 
padding-left:20px; cursor:pointer} 
span.emotion:hover{background-position:2px -28px} 
.qqFace{margin-top:4px;background:#fff;padding:2px;border:1px #dfe6f6 solid;} 
.qqFace table td{padding:0px;} 
.qqFace table td img{cursor:pointer;border:1px #fff solid;} 
.qqFace table td img:hover{border:1px #0066cc solid;} 
#show{width:680px; margin:20px auto} 

$(function(){ 
 $('.emotion').qqFace({ 
  assign:'saytext', //给输入框赋值 
  path:'face/' //表情图片存放的路径 
 }); 
 ... 
}); 

$(function(){ 
 ... 
 $(".sub_btn").click(function(){ 
  var str = $("#saytext").val(); 
  $("#show").html(replace_em(str)); 
 }); 
}); 
function replace_em(str){ 
 str = str.replace(/\</g,'<；'); 
 str = str.replace(/\>/g,'>；'); 
 str = str.replace(/\n/g,'<；br/>；'); 
 str = str.replace(/\[em_([0-9]*)\]/g,'<img src="face/$1.gif" border="0" />'); 
 return str; 
} 

function ubbReplace($str){ 
 $str = str_replace(">",'<；',$str); 
 $str = str_replace(">",'>；',$str); 
 $str = str_replace("\n",'>；br/>；',$str); 
 $str = preg_replace("[\[em_([0-9]*)\]]",">img src=\"face/$1.gif\" />",$str); 
 return $str; 
}