Custom AutoComplete 5: Build an additional row on the top of AutoComplete List

Before anything, please check this(http://www.globrix.com/):



We know we can customize AutoComplete. In this image, we can achieve the red background, Font style and seting some shining picture as the background. But one thing we need to notice is that there is an arrowhead on the top of row. So we have to make an additional row for it. And this row is not an item in the list; mouse event should be unavailable here.

Let code speak anything:

In this sample, you can define autocomplete_firstRow css style. In this case, you can define a background image in firstrow.

.autocomplete_firstrow
{
background-color:Red;
height:20px;


}

After you create an AutoComplete on the page, the below JavaScript will be worked of it. It will create an addition row on the top of AutoComplete. Suppose that the behaviorID of AutoComplete is "AutoCompleteEx".

<script type="text/javascript">


        function ClientPopulated() {
            var comletionList = $find("AutoCompleteEx").get_completionList();
           



            var firstrow=document.createElement("div");
            firstrow.id="firstrow";
            firstrow.className = "autocomplete_firstrow";

            comletionList.insertBefore(firstrow, comletionList.firstChild);
  



        }

       

        function pageLoad() {
            var autoc = $find("AutoCompleteEx");
//redefine highlightitem function
            autoc._highlightItem = function(item) {

                var children = autoc._completionListElement.childNodes;
                if (item === children[0])
                    return;

                for (var i = 0; i < children.length; i++) {
                    var child = children[i];
                    if (child._highlighted) {
                        if (autoc._completionListItemCssClass) {
                            Sys.UI.DomElement.removeCssClass(child, autoc._highlightedItemCssClass);
                            Sys.UI.DomElement.addCssClass(child, autoc._completionListItemCssClass);
                        } else {
                            if (Sys.Browser.agent === Sys.Browser.Safari) {
                                child.style.backgroundColor = 'white';
                                child.style.color = 'black';
                            } else {
                                child.style.backgroundColor = autoc._textBackground;
                                child.style.color = autoc._textColor;
                            }
                        }
                        autoc.raiseItemOut(new AjaxControlToolkit.AutoCompleteItemEventArgs(child, child.firstChild.nodeValue, child._value));
                    }
                }

                // Highlight the new item
                if (this._highlightedItemCssClass) {
                    Sys.UI.DomElement.removeCssClass(item, this._completionListItemCssClass);
                    Sys.UI.DomElement.addCssClass(item, this._highlightedItemCssClass);
                } else {
                    if (Sys.Browser.agent === Sys.Browser.Safari) {
                        item.style.backgroundColor = 'lemonchiffon';
                    } else {
                        item.style.backgroundColor = 'highlight';
                        item.style.color = 'highlighttext';
                    }

                }
                item._highlighted = true;

                this.raiseItemOver(new AjaxControlToolkit.AutoCompleteItemEventArgs(item, item.firstChild.nodeValue, item._value));


            };

//redefine settext function
            autoc._setText = function(item) {
            var children = autoc._completionListElement.childNodes;
                if (item === children[0])
                    return;
                var text = (item && item.firstChild) ? item.firstChild.nodeValue : null;

                autoc._timer.set_enabled(false);

                var element = autoc.get_element();
                var control = element.control;
                if (control && control.set_text) {
                    control.set_text(text);
                    $common.tryFireEvent(control, "change");
                }
                else {
                    element.value = text;
                    $common.tryFireEvent(element, "change");
                }
                autoc.raiseItemSelected(new AjaxControlToolkit.AutoCompleteItemEventArgs(item, text, item ? item._value : null));

                autoc._currentPrefix = autoc._currentCompletionWord();
                autoc._hideCompletionList();
            };

      }
       


    </script>