if (document.images) {       

//create "on" array and populate with image objects
   var onImgArray = new Array ()
   onImgArray[1] = new Image(81,25)
   onImgArray[2] = new Image(81,25)
   onImgArray[3] = new Image(81,25)
   onImgArray[4] = new Image(81,25)
   onImgArray[5] = new Image(81,25)
   onImgArray[6] = new Image(81,25)
   onImgArray[7] = new Image(81,25)
   onImgArray[8] = new Image(81,25)
   onImgArray[9] = new Image(81,25)
   onImgArray[10] = new Image(81,25)
   onImgArray[11] = new Image(81,25)   

//set URLs for the "on" images
   onImgArray[1].src = "images/z-Home-on.jpg"
   onImgArray[2].src = "images/z-About_Us-on.jpg"
   onImgArray[3].src = "images/z-Web_Design-on.jpg"
   onImgArray[4].src = "images/z-Web_Hosting-on.jpg"
   onImgArray[5].src = "images/z-eCommerce-on.jpg"
   onImgArray[6].src = "images/z-Planning-on.jpg"
   onImgArray[7].src = "images/z-Marketing-on.jpg"
   onImgArray[8].src = "images/z-Support-on.jpg"
   onImgArray[9].src = "images/z-Contact_Us-on.jpg"
   onImgArray[10].src = "images/z-SEO-on.jpg"
   onImgArray[11].src = "images/z-WhyHelpful Hal-on.jpg"   
   
//create "off" array and populate with image objects
   var offImgArray = new Array ()
   offImgArray[1] = new Image(81,25)
   offImgArray[2] = new Image(81,25)
   offImgArray[3] = new Image(81,25)
   offImgArray[4] = new Image(81,25)
   offImgArray[5] = new Image(81,25)
   offImgArray[6] = new Image(81,25)
   offImgArray[7] = new Image(81,25)
   offImgArray[8] = new Image(81,25)
   offImgArray[9] = new Image(81,25)
   offImgArray[10] = new Image(81,25)
   offImgArray[11] = new Image(81,25)   

//set URLs for the "off" images
   offImgArray[1].src = "images/z-Home-off.jpg"
   offImgArray[2].src = "images/z-About_Us-off.jpg"
   offImgArray[3].src = "images/z-Web_Design-off.jpg"
   offImgArray[4].src = "images/z-Web_Hosting-off.jpg"
   offImgArray[5].src = "images/z-eCommerce-off.jpg"
   offImgArray[6].src = "images/z-Planning-off.jpg"
   offImgArray[7].src = "images/z-Marketing-off.jpg"
   offImgArray[8].src = "images/z-Support-off.jpg"
   offImgArray[9].src = "images/z-Contact_Us-off.jpg"
   offImgArray[10].src = "images/z-SEO-off.jpg"
   offImgArray[11].src = "images/z-WhyHelpful Hal-off.jpg"   
  }

function imageOn(i) {
     if (document.images) {
	     document.images[i].src = onImgArray[i].src
	 }
}
function imageOff(i) {
     if (document.images) {
	     document.images[i].src = offImgArray[i].src
	 }
}	 
function imageOn(i) {
     if (document.images) {
	     document.images["btn" + i].src = onImgArray[i].src
	 }     		       
}
function imageOff(i) {
     if (document.images) {
	     document.images["btn" + i].src = offImgArray[i].src
	 }     		       
}