document.onmouseover = overhandler;

document.onmouseout = outhandler;

document.onclick = clickhandler;

if (document.images) {

	    var bhoma = new Image();
            bhoma.src = "images/bhoma.gif";
            var bhomb = new Image();
            bhomb.src = "images/bhomb.gif";

            var bcona = new Image();
            bcona.src = "images/bcona.gif";
            var bconb = new Image();
            bconb.src = "images/bconb.gif";
			  	
	    var bhisa = new Image();
            bhisa.src = "images/bhisa.gif";
            var bhisb = new Image();
            bhisb.src = "images/bhisb.gif";

	    var borga = new Image();
            borga.src = "images/borga.gif";
            var borgb = new Image();
            borgb.src = "images/borgb.gif";

	    var bmana = new Image();
            bmana.src = "images/bmana.gif";
            var bmanb = new Image();
            bmanb.src = "images/bmanb.gif";

	    var bthea = new Image();
            bthea.src = "images/bthea.gif";
            var btheb = new Image();
            btheb.src = "images/btheb.gif";

            var bacha = new Image();
            bacha.src = "images/bacha.gif";
            var bachb = new Image();
            bachb.src = "images/bachb.gif";

	    var bprea = new Image();
            bprea.src = "images/bprea.gif";
            var bpreb = new Image();
            bpreb.src = "images/bpreb.gif";

	    var bopia = new Image();
            bopia.src = "images/bopia.gif";
            var bopib = new Image();
            bopib.src = "images/bopib.gif";

	    var bsana = new Image();
            bsana.src = "images/bsana.gif";
            var bsanb = new Image();
            bsanb.src = "images/bsanb.gif";

	    var boura = new Image();
            boura.src = "images/boura.gif";
            var bourb = new Image();
            bourb.src = "images/bourb.gif";

	    var bsuba = new Image();
            bsuba.src = "images/bsuba.gif";
            var bsubb = new Image();
            bsubb.src = "images/bsubb.gif";

	    var barca = new Image();
            barca.src = "images/barca.gif";
            var barcb = new Image();
            barcb.src = "images/barcb.gif";

            var bgena = new Image();
            bgena.src = "images/bgena.gif";
            var bgenb = new Image();
            bgenb.src = "images/bgenb.gif";

    	    var hand = new Image();
            hand.src = "images/hand.gif";

	    var lastone = new Image();
}


function clickhandler() {
  var srce = window.event.srcElement;
  var sname = srce.name;
  if(sname){
  switch(sname.substring(0,1)){
	case 'b':
		if ((document.images) && (lastone!=srce))
		{
			if(lastone.name) 
   				document[lastone.name].src =  eval(lastone.name + "a.src");
			document[sname].src = eval(sname + "b.src");
			lastone=srce;
		}
		break;
	default:
		break;
  }}
}

function overhandler() {
  var srce = window.event.srcElement;
  var sname = srce.name;
  if(sname){
  switch(sname.substring(0,1)){
	case 'b':
		if (document.images)
			if (lastone!=srce)
				document[sname].src = eval(sname + "b.src");
		break;
	default:
		break;
  }}
}

function outhandler() {
  var srce = window.event.srcElement;
  var sname = srce.name;
  if(sname){
  switch(sname.substring(0,1)){
	case 'b':
		if (document.images)
			if (lastone!=srce)
				document[sname].src = eval(sname + "a.src");
		break;
	default:
		break;
  }}
}