var rollover_superDuperPreLoad = '';

	function rollover_PreLoad() 
		{
		rollover_PreLoadImage('navClientListOn',						'images/navClientListOn.gif');
		rollover_PreLoadImage('navClientListOff',						'images/navClientList.gif');
		
		rollover_PreLoadImage('rollover_soundInsulationOn',				'images/navOurGreenOn.gif');
		rollover_PreLoadImage('rollover_soundInsulationOff',			'images/navOurGreen.gif');
		
		rollover_PreLoadImage('navServicesOn',							'images/navServicesOn.gif');
		rollover_PreLoadImage('navServicesOff',							'images/navServices.gif');
		
		rollover_PreLoadImage('navPeopleOn',  							'images/navPeopleOn.gif');
		rollover_PreLoadImage('navPeopleOff', 							'images/navPeople.gif');		
		
		rollover_PreLoadImage('rollover_noiseTroubleshootingOn',		'images/navNoiseTroubleshootOn.gif');
		rollover_PreLoadImage('rollover_noiseTroubleshootingOff',		'images/navNoiseTroubleshoot.gif');
		
		rollover_PreLoadImage('rollover_contactOn', 					'images/navContactOn.gif');
		rollover_PreLoadImage('rollover_contactOff',					'images/navContact.gif');
				
		rollover_PreLoadImage('rollover_homeOn', 						'images/homeOn.gif');
		rollover_PreLoadImage('rollover_homeOff',						'images/homeOff.gif');
										
		rollover_superDuperPreLoad = 'finished';
		}
		
	function rollover_PreLoadImage(imgObj,imgSrc) 
		{
		if (document.images) 
			{
			eval(imgObj + ' = new Image()');
			eval(imgObj + '.src = "' + imgSrc +'"');
			}
		}

	function rollover_changeImage(imgName,imgObj) 
		{
		 if (rollover_superDuperPreLoad == 'finished') 
			{
			if ((document.images[imgName]) && (imgObj)) 
				{
				document.images[imgName].src = eval(imgObj + ".src");
				}
			}
		}