function getDocumentWidth()
{
   var myWidth = 0, myHeight = 0;
   if( typeof( window.innerWidth ) == 'number' )
   {
      //Non-IE
      myWidth  = window.innerWidth;
      myHeight = window.innerHeight;
   }
   else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) )
   {
      //IE 6+ in 'standards compliant mode'
      myWidth  = document.documentElement.clientWidth;
      myHeight = document.documentElement.clientHeight;
   }
   else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) )
   {
      //IE 4 compatible
      myWidth  = document.body.clientWidth;
      myHeight = document.body.clientHeight;
   }
   return myWidth;
} 

function getDocumentHeight()
{
   var myWidth = 0, myHeight = 0;
   if( typeof( window.innerWidth ) == 'number' )
   {
      //Non-IE
      myWidth  = window.innerWidth;
      myHeight = window.innerHeight;
   }
   else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) )
   {
      //IE 6+ in 'standards compliant mode'
      myWidth  = document.documentElement.clientWidth;
      myHeight = document.documentElement.clientHeight;
   }
   else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) )
   {
      //IE 4 compatible
      myWidth  = document.body.clientWidth;
      myHeight = document.body.clientHeight;
   }
   return myHeight;
} 

function preloadMenuImages()
{
   var img = new Image();
   img.src = "../images/home_ov.png";
   img = new Image();
   img.src = "../images/services_ov.png";
   img = new Image();
   img.src = "../images/about-us_ov.png";
   img = new Image();
   img.src = "../images/contact-us_ov.png";
   img = new Image();
   img.src = "../images/request-info_ov.png";
   img = new Image();
   img.src = "../images/products_ov.png";
   img = new Image();
   img.src = "../images/projects_ov.png";
}

preloadMenuImages();