Dynamic Iframes Memory Leak In Internet Explorer

I have an Infragistics UltrawebGrid [hierarchical grid with 3 levels]. Each Row in the grid is attached to a context menu using Infragistics CSOM [Client Side Object Model]



Upon click on the menu, I am creating an Iframe dynamically which loads another page in the same domain [same web application] which also contains infragistics datagid [non hierarchical] populated with default data retrieved from Data Base. After creating the frame I am attaching it to the HTML DOM [Div Layer] and show it as modal popup with OK and Cancel Button. Upon click on any of the buttons, I am destroying the Iframe from DOM.

Following are the functions I am using for Iframe Creation and Destroy.

//-------------------------------------------------------------------------

// oSrcCtrl – Parent Control where dynamic iframe to be attached (DIV)
// strFraId - Iframe Identifier
//-------------------------------------------------------------------------

function CreateIFrame(oSrcCtrl,strFraId) {

    var iframe = document.createElement("iframe");

    iframe.setAttribute("id", strFraId);

    iframe.setAttribute("scrolling", "no");

    iframe.setAttribute("frameBorder", "0");   

    oSrcCtrl.appendChild(iframe);

}

//-------------------------------------------------------------------------

// oSrcCtrl – Parent Control where dynamic iframe to be attached (DIV)
// strFraId - Iframe Identifier
//-------------------------------------------------------------------------
function DestroyIframeById(oSrcCtrl, strFraId)

{     

    if (document.all)

    {       

        document.getElementById(strFraId).src = 'javascript:false';

        document.all[strFraId].outerHTML = '';

           }else{

        oSrcCtrl.removeChild(document.getElementById(strFraId));

    }  

}

Repeatedly clicking on the menu [for iframe creation] & OK, Cancel button [for destroying iframe] causing huge performance bottleneck. The amount of memory used by the IE keeps on increasing for each clicks I.e. [Dynamic Creation of iframe and Removing the same after button click] but while unloading the page i.e. navigating to a different page the IE memory usage comes to normal.



I would need your help to validate my JavaScript codes for Iframe creation and Remove. Also request you guys to suggest some alternate solutions to get away this memory leak.



Note:

1. The response time to load the iframe is not an issue; it loads with in the expected time

2. For each Iframe request the response size is nearly 500KB [includes data retrieved from database + infragistics JavaScript resource files]

cdmsenthil@gmail.com