用Div仿showModalDialog模式菜单的效果的代码_javascript技巧

<p id="buySelName" class="modalp" style="position:absolute;left:300px; top:140px;z-index:2;display:none;"> 
</p>

<p id="disablep" style="position:absolute; left:0px; top:0px; width:100%; height:100%; z-index:1; background-color:#000000; border: 0px none #000000; FILTER:alpha(opacity=50);display:none;";><iframe src="about:blank" name="hiddenIframe" width="100%" height="100%"></iframe></p>

<p id="objText" style="display:none;"> 
<p class="modalheader"> 
  <p class="header"> 
   <p class="mleft"> 
    <p class="boxheader-text"><span class="b">显示窗体</span></p> 
   </p> 
   <p class="btnright"><a href="javascript:ShowModal('buy');"><img src="close.gif" alt="关闭" /></a></p> 
  </p> 
</p> 
<p class="modalbody"> 
  希望能大家多多交流! 
</p> 
</p>

<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
function ShowModal(dname) 
{ 
  var buyp=document.getElementById(dname+'SelName'); 
  var objp=document.getElementById('objText'); 
  var disable=document.getElementById('disablep'); 
  if(buyp.style.display=='none') 
  { 
   buyp.style.display='block'; 
   disable.style.display='block'; 
   buyp.innerHTML=objp.innerHTML; 
  }else{ 
   buyp.style.display='none'; 
   disable.style.display='none'; 
  } 
} 
//--> 
</SCRIPT>