// chafafunciones básicas mexgroove.com biatch!
function popup(url) {
aa=window.open(url,'Popup','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=705,height=530');
aa.focus();
}

function popupform(myform, windowname)
{
if (! window.focus)return true;
window.open('', windowname, 'height=510,width=430,scrollbars=yes');
myform.target=windowname;
return true;
}


function loadpage(url,name,X,Y) {
    var size = "width="+X+",height="+Y+",top=80,left=120,resizeable=no,scrollbars=no,toolbar=no,location=no,status=no,menubar=no";
    name = window.open(url,name,size);
    name.focus();
}

function loadscrollpage(url,name,X,Y) {
    var size = "width="+X+",height="+Y+",scrollbars";
    name = window.open(url,name,size);
    name.focus();
}
function getRandom(range) 
{
	return Math.round(Math.random() * range);
}

//stuff for rotating preview images
rotar = new Array (
	"formato/cabecera1.gif",
	"formato/cabecera2.gif",
	"formato/cabecera3.gif",
    "formato/cabecera4.gif",
	"http://www.mexgroove.com/media/fotos/skate5.jpg",
	"http://www.mexgroove.com/media/fotos/skate6.jpg"
);

randNum  = getRandom(4);