improveddown causing scrollbar flickering

I have used improveddropdown jquery plugin... my page has 10-20 dropdowns.. when the page loads the vertical scrollbars starts flickeri开发者_高级运维ng.. it flickers because the improveddrodown jquery runs on dropdowns which takes some time... how to avoid this flickering of the scrollbar?

Try this, inside the improvedDropDown.js, replace the above code. I have add 2 lines, the first is hide the control until its populate, and then show it. Try to see if this solve your problem. I must say that I try to reproduce your problem but I fail to see any flickering.

this.each(function () {
    var thisElement = $(this);

    var wrapperControl = getWrapperElement(thisElement);

    // hide it
    wrapperControl.hide();

    thisElement.after(wrapperControl);

    var newImgElement = getImageElement(thisElement,iconPath);
    wrapperControl.append(newImgElement);

    var newTextElement = getTextElement(thisElement, newImgElement);
    wrapperControl.prepend(newTextElement); 

    var newListControl = getListElement(thisElement);
    wrapperControl.append(newListControl); 

    populateList(thisElement, newListControl,noMatchesText,noItemsText);

    if (document.activeElement == thisElement[0]) {
        //if replaced element had focus, move it to new control.
        newTextElement.focus().select(); 
    }

    if (debugMode != 1) { 
        thisElement.hide();                                                
    }

    // show it now
    wrapperControl.show();
 });