show only one div within an iframe (javascript, JQ

First just let me say I'm open to ideas on a different approach altogether.

I have and iframe as such:

<div id="testloadlogin">
      <iframe src="../security/login.aspx" width="400" height="500"
             scrolling="auto" frameborder="1">
      [Your user agent does not support frames or is currently configured
      not to display frames. However, you may visit
      <a href="../security/login.aspx">the related document.</a>]
      </iframe>
</div>

The page being loaded with the iframe has a div called loginInnerBox. I only want to display the loginInnerBox and everything inside of it.

Any ideas on how to do this? I was thinking of using Jquery or javascript of some kind to remove everything else on the page loaded by the iframe, not sure how to access that though...

Just to be clear I want everything on my page outside of the iframe to remain intact. I want the equivalent of saying $.('testloadlogin').load('../security/login.aspx' #loginInnerBox) which would just get loginInnerBox's html and place it in the testloadlogin div. However I need the back-end processing from the other page which is supported by iframe, but not by the Jquery load.

The markup of the page loaded by the iframe is

<body>
    <div>
    </div>.......
    <div class="AspNet-Login" id="ctl00_CLPMainContent_Login1">
        <div id="loginInnerBox">
            <div id="loginCreds">
                <table>
                </table>
            </div>
        </div>
    </div>
    <div>
    </div>....
</body>

Do you need more information than that?

I tried this, it had no effect:

<div class="ui-corner-all" id="RefRes">
        <div id="testloadlogin">
        <iframe onload="javascript:loadlogin()" id="loginiframe" src="../security/login.aspx"
             scrolling="auto" frameborder="1">
      [Your user agent does not support frames or is currently configured
      not to display frames. However, you may visit
      <a href="../security/login.aspx">the related document.</a>]
      </iframe>
        </div>
    </div>
    <script type="text/javascript">
        function loadlogin() {
            $('<body>*', this.contentWindow.document).not('#ctl00_CLPMainContent_Login1').hide();
        }
    </script>

回答1:

With jQuery, you can load not just the contents of a URL, but a specific CSS selector from within that URL. This would be a much cleaner approach. It's like this.

$("#area").load("something.html #content");

Via CSS Tricks

回答2:

$("iframe").contents().find("*:not(#loginInnerBox)").remove();

Be aware this would only work on iframes loaded from the same domain (same origin policy)

EDIT: Probably this removes children of loginInnerBox as well. In that case you could try to clone it before:

var iframe   = $("iframe").contents(),
    loginBox = iframe.find("#loginInnerBox").clone();

iframe.find("*").remove();
iframe.append(loginBox);

Something like that..

回答3:

Add this to the <iframe>-elememt:

onload="$('body>*',this.contentWindow.document).not('#ctl00_CLPMainContent_Login1').hide();"

it will hide every child of the body except #ctl00_CLPMainContent_Login1

If #ctl00_CLPMainContent_Login1 contains more than the loginbox, you have to use the suggestion using clone() posted by pex.