function menu_hover()
   {
   //alert('hovering')
   var img = event.srcElement.src
   img = img.split("/")
   img = img[img.length-1]

   var imgState = img.substring(img.length-7,img.length-4)
   if (imgState == '_on')
      {
         var imgName = img.substring(4,img.length-4)
      }
   else
      {
      var imgName = img.substring(4,img.length-4)
      event.srcElement.src = 'img/but_'+imgName+'_on.gif'
      }
   }

function menu_unhover()
   {
   var img = event.srcElement.src
   img = img.split("/")
   img = img[img.length-1]

   var imgState = img.substring(img.length-7,img.length-4)
   if (imgState == '_on')
      {
         var imgName = img.substring(4,img.length-7)
         event.srcElement.src = 'img/but_'+imgName+'.gif'
      }
   else
      {
      var imgName = img.substring(4,img.length-4)
      event.srcElement.src = 'img/but_'+imgName+'_on.gif'
      }
   }


window.onresize = function()
               {
               //alert('resized')
               //alert(document.images.sizeX.width)
               size_main_content()
               }

function size_main_content()
{
   document.all.main_content.style.pixelWidth = document.images.sizeX.width - (document.all.menu_carrier.style.pixelWidth+276)
}