if(document.images){
collection_on = new Image();
collection_on.src = "/graphics/nav/collection_on.gif"
collection_off = new Image();
collection_off.src = "/graphics/nav/collection_off.gif"
collection_hvr = new Image();
collection_hvr.src = "/graphics/nav/collection_hvr.gif"
handicrafts_on = new Image();
handicrafts_on.src = "/graphics/nav/handicrafts_on.gif"
handicrafts_off = new Image();
handicrafts_off.src = "/graphics/nav/handicrafts_off.gif"
handicrafts_hvr = new Image();
handicrafts_hvr.src = "/graphics/nav/handicrafts_hvr.gif"
aboutbd_on = new Image();
aboutbd_on.src = "/graphics/nav/aboutbd_on.gif"
aboutbd_off = new Image();
aboutbd_off.src = "/graphics/nav/aboutbd_off.gif"
aboutbd_hvr = new Image();
aboutbd_hvr.src = "/graphics/nav/aboutbd_hvr.gif"
cart_on = new Image();
cart_on.src = "/graphics/nav/cart_on.gif"
cart_off = new Image();
cart_off.src = "/graphics/nav/cart_off.gif"
cart_hvr = new Image();
cart_hvr.src = "/graphics/nav/cart_hvr.gif"
}

function button_off( buttonname, state )
{
	if (document.images) {
	document[ buttonname ].src = eval( buttonname + state + ".src" );
	}
}
function button_on ( buttonname )
{
	if (document.images) {
	document[ buttonname ].src = eval( buttonname + "_hvr.src" );
	}
}