if (document.images) {
 internet_on = new Image(); internet_on.src = "images/menu_internet_on.gif";
 internet_off = new Image(); internet_off.src = "images/menu_internet.gif";
 design_on = new Image(); design_on.src = "images/menu_design_on.gif";
 design_off = new Image(); design_off.src = "images/menu_design.gif";
 hosting_on = new Image(); hosting_on.src = "images/menu_hosting_on.gif";
 hosting_off = new Image(); hosting_off.src = "images/menu_hosting.gif";
 email_on = new Image(); email_on.src = "images/menu_email_on.gif";
 email_off = new Image(); email_off.src = "images/menu_email.gif";
 }

function turnOn(imageName) {
 if (document.images) {
  document[imageName].src = eval(imageName + "_on.src");
  }
 }

function turnOff(imageName) {
 if (document.images) {
  document[imageName].src = eval(imageName + "_off.src");
  }
 }

function toggle(objectID) {
 var object = document.getElementById(objectID);
 if (object.style.display =='block')  object.style.display='none';
 else object.style.display='block';
 return;
}