A HREF Modify the value causes the nested element inside A tag to be deleted

The following A HREF element modified through the jquery deletes the nested IMG element .

<table id="newHead" width="90%" align="center" cellpadding="0" cellspacing="0" bgcolor="#CCCCCC" style="display: none;border: 1px #000066 groove;">
    <tr height="25px"> 
        <td style="text-align: center;padding-left: 10px;"><strong style="white-space: nowrap; font-size: 12px; ">
        <font color="#000066"> Rep开发者_如何学Goort</font></strong></td>
        <td> <a id="url" href="mmRep.do?action=getXLSummReport&reportId="><img align="right" hspace="850px" src="images/graph_bar/graph_Excel.jpg" width="25" height="25" border="0"> </a></td>
    </tr>
</table>

This jquery removes the nested IMG element( )

var newurl = $("a#url").attr("href") + reportId;
$("a#url").attr("href",newurl);

After i modify the href attr value, the html becomes likes this, the img element vanishes

<td> 
<a id="url" href="mmRep.do?action=getXLSummReport&reportId=75">
</a>
</td>

Nope, it doesn't.

Make sure your reportId contains an integer, and nothing else, like quote " or a single quote '.