javascript问题

Question

<!-- div操作 --> <script type="text/javascript"> 
function show(id){ 
document.getElementById(id).style.display=""; 
} 
</script> 
<div class="style3" id="er1_con" style="display: none; height: 400px; width: 600px;"> 
<div id="tab" style="width: 500px; height: 600px;"> 
<div id="tabtop"> 
<div id="tabtop-L" onmousedown="StartDrag(this)" onmouseup="StopDrag(this)" onmousemove="Drag(this)" 
align="center" style="height: 20px; width: 500px;"> 
<strong>---点击此处可拖动窗体---</strong></div> 
<div id="tabtop-R" onclick="closeLayer()" align="right"> 
<strong>关闭</strong></div> 
</div> 
<div id="tabcontent" runat="server" align="left" style="width: 500px; height: 600px"> 
<table width="400" height="500" border="0" cellpadding="0" cellspacing="0"> 
<tr> 
<td colspan="2" rowspan="3"> 
<img id="ser3" src="images/ER1_11.gif" width="91" height="43" alt="" onclick="show('ser_con')" /></td> 
<td> 
<img src="images/分隔符.gif" width="1" height="10" alt=""/></td> 
</tr> 
<div id="ser_con" style="display: none; height: 300px; width: 300px;"> 
<div id="Div50"> 
<div id="Div52" onclick="closeDiv('ser_con')" align="right"> 
<strong>返回</strong></div> 
</div> 
我这么写的 怎么ser_con 不显示那 求高人指点

Answer 1

document.getElementById(id).style.display="block"; 

Answer 2

document.getElementById(id).style.display="inline";