detect mouseover with grid buttons?

Hello, I know of the tool tip function for on gui, but im trying to detect which button is is under the mouse to bring up a full item description in a scroll box for an inventory. I am using the basic grid

     var itemDescription: String;
        var selectionStrings : String[] = ["Grid 1", "Grid 2", "Grid 3", "Grid 4"];

            function OnGUI () {

        var selectionGridInt : int = -1;
        selectionGridInt = GUI.SelectionGrid (Rect (25, 25, 100, 30), selectionGridInt, selectionStrings, 2);

            for (  i = 0; i < items.length; i ++ ) {

                if ( selectionGridInt == i ) {
                //blah blah
}}} 

        // i dont even know//
    function OnMouseOver(selectionGridInt){
    for (  i = 0; i < items.length; i ++ ){
    ??? if(selectionGridInt == i) ???
    itemDescription = items*.GetComponent(itemScript).description;*
*```*
*<p>Thanks for any help!</p>*

selectionGridInt is the variable containing the current selected “button” from the grid.

if you put all your “results/descriptions” in another array and let the index of this array match with your grid buttons, you should be able to get it.

lets say you have selected the [Grid 3] button

then selectionGridInt would return 2 as index value (0,1,2,3 for possible grid values).

Then in your array of descriptions:

// place these in the init section of your code.

string[] descriptions = new String[]{ "Description 1", "Description 2", 
                                      "Description 3", "Description 4" }

// notice the index variable, place the following lines after the GUI Grid thing.
selectionDescription = descriptions[ selectionGridInt ]; 

// show us the result in the console window
Debug.Log(selectionDescription);