function preloadImages(the_images_array) {
  for (loop = 0; loop < the_images_array.length; loop++) {
    var an_image = new Image();
	an_image.src = the_images_array[loop]
  }
}

{
  var the_images = new Array('images/about_roll.gif, images/contact_roll.gif, images/services_roll.gif, images/client_roll.gif, images/home.gif');
  preloadImages(the_images);
}

function showRoll(butt,newbutt){
	butt.src = "images/" + newbutt
}

function showMenu1(butt){
	showRoll(butt,'programs_roll.gif');
	showMenu()
}
function showMenu(){
	var dd;
	dd = document.getElementById("ddmenu");
	//dd.style.visibility= "visible"
	dd.style.top = 135;
	dd.style.left = 187;
	dd.style.display = "block";
}

function hideMenu1(butt){
	showRoll(butt,'programs.gif');
	hideMenu();
}
function hideMenu(){
	var dd;
	dd = document.getElementById("ddmenu");
	dd.style.display = "none";
}