if (document.images)
{
            m1on = new Image();      
            m1on.src = "./images/map_nsw.gif";
            m2on = new Image();      
            m2on.src = "./images/map_vic.gif";
            m3on = new Image();      
            m3on.src = "./images/map_tas.gif";
            m4on = new Image();      
            m4on.src = "./images/map_sa.gif";
            m5on = new Image();      
            m5on.src = "./images/map_wa.gif";
            m6on = new Image();      
            m6on.src = "./images/map_qld.gif";
        
            m1off = new Image();      
            m1off.src = "./images/map.gif";
}

function mapOn(imgName)
{
        if (document.images) { document["map"].src = eval(imgName + "on.src"); }
}

function mapOff(imgName)
{
	if (document.images) { document["map"].src = eval("m1" + "off.src"); }
}