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;
	}
}