if (document.images) 
	        {
	        button1 = new Image()
	        button1.src = "/media/images/web/headers/scheme2/nav-air-off.gif"
	        button1over = new Image()
	        button1over.src = "/media/images/web/headers/scheme2/nav-air-on.gif"
	        
	        button2 = new Image()
	        button2.src = "/media/images/web/headers/scheme2/nav-helis-off.gif"
	        button2over = new Image()
	        button2over.src = "/media/images/web/headers/scheme2/nav-helis-on.gif"
	
	        button3 = new Image()
	        button3.src = "/media/images/web/headers/scheme2/nav-boats-off.gif"
	        button3over = new Image()
	        button3over.src = "/media/images/web/headers/scheme2/nav-boats-on.gif"
	        
	        button4 = new Image()
	        button4.src = "/media/images/web/headers/scheme2/nav-trains-off.gif"
	        button4over = new Image()
	        button4over.src = "/media/images/web/headers/scheme2/nav-trains-on.gif"
			
	        button5 = new Image()
	        button5.src = "/media/images/web/headers/scheme2/nav-general-off.gif"
	        button5over = new Image()
	        button5over.src = "/media/images/web/headers/scheme2/nav-general-on.gif"
			
	        button6 = new Image()
	        button6.src = "/media/images/web/headers/scheme2/nav-tools-off.gif"
	        button6over = new Image()
	        button6over.src = "/media/images/web/headers/scheme2/nav-tools-on.gif"
	        
	        button7 = new Image()
	        button7.src = "/media/images/web/headers/scheme2/nav-browse-off.gif"
	        button7over = new Image()
	        button7over.src = "/media/images/web/headers/scheme2/nav-browse-on.gif"
			
	        button8 = new Image()
	        button8.src = "/media/images/web/headers/scheme2/nav-cars-off.gif"
	        button8over = new Image()
	        button8over.src = "/media/images/web/headers/scheme2/nav-cars-on.gif"
			}
	
	function switchimage(string,i) 
	{
		if (document.images) 
			eval("document.button" + i + ".src = " + string) 
	}