function swapImg(image,newImage)
    {
        image.src=newImage;
    }

    function swapImg2(imgName,newImg)
    {
        var img = document.images[imgName];
        img.src = newImg;
    }
		

if( document.images )
		{
			var serviceOff = new Image( 85,85 );
			serviceOff.src = 'images/service_off.gif';
			
			var serviceOn = new Image( 85,85 );
			serviceOn.src = 'images/service_on.gif';
			
			
			var portfolioOff = new Image( 85,85 );
			portfolioOff.src = 'images/portfolio_off.gif';
			
			var portfolioOn = new Image( 85,85 );
			portfolioOn.src = 'images/portfolio_on.gif';
			
			
			var aboutusOff = new Image( 85,85 );
			aboutusOff.src = 'images/about_off.gif';
			
			var aboutusOn = new Image( 85,85 );
			aboutusOn.src = 'images/about_on.gif';
			
			
			var contactusOff = new Image( 85,85 );
			contactusOff.src = 'images/contact_off.gif';
			
			var contactusOn = new Image( 85,85 );
			contactusOn.src = 'images/contact_on.gif';
			
			
			var expoOff = new Image( 85,85 );
			expoOff.src = 'images/expo_off.gif';
			
			var expoOn = new Image( 85,85 );
			expoOn.src = 'images/expo_on.gif';
			
			
			var homeOff = new Image( 85,85 );
			homeOff.src = 'images/home_off.gif';
			
			var homeOn = new Image( 85,85 );
			homeOn.src = 'images/home_on.gif';	
			
			
			
					}
		
		
		function roll (onOff,imgName) {
			if( document.images )
			{
				document.images[imgName].src = eval( imgName + onOff + '.src');
			}
			return true;
		}