var cellName=null;
var imageDir="/graphics/";

//pre-load images if "Image" is defined


if(document.images)
   {
    var item_IMG_01_off = new Image();
    item_IMG_01_off.src = imageDir+"bu_prem.off.gif"; 
    var item_IMG_01_on  = new Image();
    item_IMG_01_on.src  = imageDir+"bu_prem.on.gif";

    var item_IMG_02_off = new Image();
    item_IMG_02_off.src = imageDir+"bu_edu.off.gif"; 
    var item_IMG_02_on  = new Image();
    item_IMG_02_on.src  = imageDir+"bu_edu.on.gif";

    var item_IMG_03_off = new Image();
    item_IMG_03_off.src = imageDir+"bu_upd.off.gif";
    var item_IMG_03_on  = new Image();
    item_IMG_03_on.src  = imageDir+"bu_upd.on.gif";
    
     var item_IMG_04_off = new Image();
    item_IMG_04_off.src = imageDir+"bu_man.off.gif"; 
    var item_IMG_04_on  = new Image();
    item_IMG_04_on.src  = imageDir+"bu_man.on.gif";
    
     var item_IMG_05_off = new Image();
    item_IMG_05_off.src = imageDir+"bu_links.off.gif"; 
    var item_IMG_05_on  = new Image();
    item_IMG_05_on.src  = imageDir+"bu_links.on.gif";
    
     var item_IMG_06_off = new Image();
    item_IMG_06_off.src = imageDir+"bu_tools.off.gif"; 
    var item_IMG_06_on  = new Image();
    item_IMG_06_on.src  = imageDir+"bu_tools.on.gif";
    
     var item_IMG_07_off = new Image();
    item_IMG_07_off.src = imageDir+"bu_media.off.gif"; 
    var item_IMG_07_on  = new Image();
    item_IMG_07_on.src  = imageDir+"bu_media.on.gif";
 
     var item_IMG_08_off = new Image();
    item_IMG_08_off.src = imageDir+"bu_ct.off.gif"; 
    var item_IMG_08_on  = new Image();
    item_IMG_08_on.src  = imageDir+"bu_ct.on.gif";
    
    var item_IMG_09_off = new Image();
    item_IMG_09_off.src = imageDir+"bu_bios.off.gif"; 
    var item_IMG_09_on  = new Image();
    item_IMG_09_on.src  = imageDir+"bu_bios.on.gif";
    
    var item_IMG_10_off = new Image();
    item_IMG_10_off.src = imageDir+"bu_jobs.off.gif"; 
    var item_IMG_10_on  = new Image();
    item_IMG_10_on.src  = imageDir+"bu_jobs.on.gif";
    
    var item_IMG_11_off = new Image();
    item_IMG_11_off.src = imageDir+"bu_hom.off.gif"; 
    var item_IMG_11_on  = new Image();
    item_IMG_11_on.src  = imageDir+"bu_hom.on.gif";
    
    var item_IMG_12_off = new Image();
    item_IMG_12_off.src = imageDir+"bu_mbs.off.gif"; 
    var item_IMG_12_on  = new Image();
    item_IMG_12_on.src  = imageDir+"bu_mbs.on.gif";
    
    var item_IMG_13_off = new Image();
    item_IMG_13_off.src = imageDir+"bu_res.off.gif"; 
    var item_IMG_13_on  = new Image();
    item_IMG_13_on.src  = imageDir+"bu_res.on.gif";
    
    var item_IMG_14_off = new Image();
    item_IMG_14_off.src = imageDir+"bu_comres.off.gif"; 
    var item_IMG_14_on  = new Image();
    item_IMG_14_on.src  = imageDir+"bu_comres.on.gif";
    
    var item_IMG_15_off = new Image();
    item_IMG_15_off.src = imageDir+"bu_log2.off.gif";
    var item_IMG_15_on  = new Image();
    item_IMG_15_on.src  = imageDir+"bu_log2.on.gif";
    }

function over(cellName) 
    {
     if(document.images) 
       {
        if(cellName == 'button1') {document[cellName].src = item_IMG_01_on.src;}
        if(cellName == 'button2') {document[cellName].src = item_IMG_02_on.src;}
        if(cellName == 'button3') {document[cellName].src = item_IMG_03_on.src;}
        if(cellName == 'button4') {document[cellName].src = item_IMG_04_on.src;}
        if(cellName == 'button5') {document[cellName].src = item_IMG_05_on.src;}
        if(cellName == 'button6') {document[cellName].src = item_IMG_06_on.src;}
        if(cellName == 'button7') {document[cellName].src = item_IMG_07_on.src;}
        if(cellName == 'button8') {document[cellName].src = item_IMG_08_on.src;}
        if(cellName == 'button9') {document[cellName].src = item_IMG_09_on.src;}
        if(cellName == 'button10') {document[cellName].src = item_IMG_10_on.src;}
        if(cellName == 'button11') {document[cellName].src = item_IMG_11_on.src;}
		if(cellName == 'button12') {document[cellName].src = item_IMG_12_on.src;}
        if(cellName == 'button13') {document[cellName].src = item_IMG_13_on.src;}
        if(cellName == 'button14') {document[cellName].src = item_IMG_14_on.src;}
        if(cellName == 'button15') {document[cellName].src = item_IMG_15_on.src;}
       }
}

function out(cellName) 
    {
     if(document.images) 
       {
        if(cellName == 'button1') {document[cellName].src = item_IMG_01_off.src;}
        if(cellName == 'button2') {document[cellName].src = item_IMG_02_off.src;}
        if(cellName == 'button3') {document[cellName].src = item_IMG_03_off.src;}
        if(cellName == 'button4') {document[cellName].src = item_IMG_04_off.src;}
        if(cellName == 'button5') {document[cellName].src = item_IMG_05_off.src;}
        if(cellName == 'button6') {document[cellName].src = item_IMG_06_off.src;}
        if(cellName == 'button7') {document[cellName].src = item_IMG_07_off.src;}
        if(cellName == 'button8') {document[cellName].src = item_IMG_08_off.src;}
        if(cellName == 'button9') {document[cellName].src = item_IMG_09_off.src;}
        if(cellName == 'button10') {document[cellName].src = item_IMG_10_off.src;}
        if(cellName == 'button11') {document[cellName].src = item_IMG_11_off.src;}
        if(cellName == 'button12') {document[cellName].src = item_IMG_12_off.src;}
        if(cellName == 'button13') {document[cellName].src = item_IMG_13_off.src;}
        if(cellName == 'button14') {document[cellName].src = item_IMG_14_off.src;}		
         if(cellName == 'button15') {document[cellName].src = item_IMG_15_off.src;}		
      }
}