function openWindow(myUrl,am,al,nom){
	  var ampla = am;
	  var altura = al;
	  strURL = myUrl;
	  poshoritz = (screen.width) ? (screen.width-ampla)/2 : 0;
	  posvert = (screen.height) ? (screen.height-altura)/2 : 0;
	  strW = 'toolbar=0,directories=0,location=0,status=no,menubar=0,resizable=0,copyhistory=0,scrollbars=0,width='+ ampla + ',height='+ altura + ',top='+ posvert + ',left='+ poshoritz;
	  eval("window.open('" + strURL + "',nom,'" + strW + "')");
	}

var p;
var q;

function inici(p){
	if (p != 0) {
		eval("document.m"+p+".src=m"+p+"_on.src");
	}
return true;
}

function marca_on(q) {
	if (pag!=q)
	{
		eval("document.m"+q+".src=m"+q+"_on.src");
		return true;
	}
}

function marca_of(q) {
	eval("document.m"+q+".src=m"+q+"_of.src");
	inici(pag);
}


for (i=0;i<6;i++){ // 7-Visita betfair. 8-mas informacion
	eval("m"+i+"_on=new Image()");
	eval("m"+i+"_on.src = 'img/menu/m"+i+"_on.jpg'");
	eval("m"+i+"_of=new Image()");
	eval("m"+i+"_of.src = 'img/menu/m"+i+"_of.jpg'");
}