if (document.images) {
				
	aboutbuttonover       		= new Image();
	aboutbuttonover.src   		= "_images/mainmenu/about_high.gif";
	aboutbuttonout    			= new Image();
	aboutbuttonout.src 			= "_images/mainmenu/about.gif";
	
	energybuttonover       		= new Image();
	energybuttonover.src   		= "_images/mainmenu/ernergy_high.gif";
	energybuttonout    			= new Image();
	energybuttonout.src 		= "_images/mainmenu/ernergy.gif";
	
	offerbuttonover       		= new Image();
	offerbuttonover.src   		= "_images/mainmenu/offer_high.gif";
	offerbuttonout    			= new Image();
	offerbuttonout.src 			= "_images/mainmenu/offer.gif";
	
	roadshowbuttonover      	= new Image();
	roadshowbuttonover.src  	= "_images/mainmenu/roadshows_high.gif";
	roadshowbuttonout    		= new Image();
	roadshowbuttonout.src 		= "_images/mainmenu/roadshows.gif";
	
	pressbuttonover       		= new Image();
	pressbuttonover.src   		= "_images/mainmenu/press_high.gif";
	pressbuttonout    			= new Image();
	pressbuttonout.src 			= "_images/mainmenu/press.gif";
	
	contactbuttonover       	= new Image();
	contactbuttonover.src   	= "_images/mainmenu/contact_high.gif";
	contactbuttonout    		= new Image();
	contactbuttonout.src 		= "_images/mainmenu/contact.gif";
	
	spacerbuttonover       		= new Image();
	spacerbuttonover.src   		= "_images/mainmenu/menu_spacer_hi.gif";
	spacerbuttonout    			= new Image();
	spacerbuttonout.src 		= "_images/mainmenu/menu_spacer.gif";
}



function onMouseOver(buttonname){
	if (document.images) {
		document[ buttonname ].src = eval( buttonname + "over.src" );
	}
	
	switch (buttonname) {
		case "aboutbutton":
			document[ "spacer5" ].src = eval( "spacerbuttonover.src" );
			break;
		case "energybutton":
			document[ "spacer5" ].src = eval( "spacerbuttonover.src" );
			document[ "spacer4" ].src = eval( "spacerbuttonover.src" );
			break;
		case "offerbutton":
			document[ "spacer4" ].src = eval( "spacerbuttonover.src" );
			document[ "spacer3" ].src = eval( "spacerbuttonover.src" );
			break;
		case "roadshowbutton":
			document[ "spacer3" ].src = eval( "spacerbuttonover.src" );
			document[ "spacer2" ].src = eval( "spacerbuttonover.src" );
			break;
		case "pressbutton":
			document[ "spacer2" ].src = eval( "spacerbuttonover.src" );
			document[ "spacer1" ].src = eval( "spacerbuttonover.src" );
			break;
		case "contactbutton":
			document[ "spacer1" ].src = eval( "spacerbuttonover.src" );
			break;
	}
}

function onMouseOut(buttonname){
	
	if (document.images) {
		document[ buttonname ].src = eval( buttonname + "out.src" );
	}
	
	switch (buttonname) {
		case "aboutbutton":
			document[ "spacer5" ].src = eval( "spacerbuttonout.src" );
			break;
		case "energybutton":
			document[ "spacer5" ].src = eval( "spacerbuttonout.src" );
			document[ "spacer4" ].src = eval( "spacerbuttonout.src" );
			break;
		case "offerbutton":
			document[ "spacer4" ].src = eval( "spacerbuttonout.src" );
			document[ "spacer3" ].src = eval( "spacerbuttonout.src" );
			break;
		case "roadshowbutton":
			document[ "spacer3" ].src = eval( "spacerbuttonout.src" );
			document[ "spacer2" ].src = eval( "spacerbuttonout.src" );
			break;
		case "pressbutton":
			document[ "spacer2" ].src = eval( "spacerbuttonout.src" );
			document[ "spacer1" ].src = eval( "spacerbuttonout.src" );
			break;
		case "contactbutton":
			document[ "spacer1" ].src = eval( "spacerbuttonout.src" );
			break;
	}
}