"所见即所得模式"的功能


谁帮我添加左,右,中对齐的功能<html>
<head><title></title>
<!--添加样式表-->
<style type='text/css'>
div,td{font-size:10pt;padding:0;}
</style><!--JavaScript主要插入操作代码-->
<script language='javascript'>        function div_edit()
        {
                html='<div id=divedit contenteditable=true style="width:430px; height:300px; border:1px #456 solid;" onclick="pos()" onkeyup="pos()"></div>';
                editor.innerHTML=html;
                submit_html='<form name=fm method=post action=me.php><input type=hidden name=divinit value=1><div style="display:none"><textarea name=content></textarea></div></form><br><input type=button value="  提交  " onclick="document.all.fm.submit()">';
                submit.innerHTML=submit_html;
                face_html='<table width=145><tr><td height=25><img src="face/01.gif" onclick=div_insert("01")></td><td><img src="face/02.gif" onclick=div_insert("02")></td><td><img src="face/03.gif" onclick=div_insert("03")></td><td><img src="face/04.gif" onclick=div_insert("04")></td></tr><tr><td height=25><img src="face/05.gif" onclick=div_insert("05")></td><td><img src="face/06.gif" onclick=div_insert("06")></td><td><img src="face/07.gif" onclick=div_insert("07")></td><td><img src="face/08.gif" onclick=div_insert("08")></td></tr><tr><td height=25><img src="face/09.gif" onclick=div_insert("09")></td><td><img src="face/10.gif" onclick=div_insert("10")></td><td> </td><td> </td></tr></table>';
                face.innerHTML=face_html;
        }
                function pos()
        {
                Pos=document.selection.createRange();
        }        function div_insert(url)
        {
                if(Pos && url)
                {        
                        img="<img src='face/"+url+".gif' align=absmiddle>";
                        Pos.pasteHTML(img);
                        Pos.collapse(true);
                        Pos.select();
                        document.all.fm.content.value=divedit.innerHTML;
                }
        }        
</script>
</head>
<body onLoad="div_edit()">
<table border=0 width=600 align=center>
<tr>
        <td colspan=2 align=right>
         
            <input name="Zuo" type="submit" id="Zuo" value="左">
            <input name="zhong" type="submit" id="zhong" value="中">
           <input name="you" type="submit" id="you" value="右">
        <input type=button value="所见即所得模式" onClick="div_edit()"></td>
</tr>
<tr>
        <td width=440 id=editor><td>
        <td id=face valign=top>hello</td>
</tr>
<tr>
        <td id=submit style="padding-left:150px;"></td>
</tr>
</table><br>
</body>
</html>