var loader = { 
  imgs: [],
  load: function(src) {img=this.imgs; var ct=img.length; img[ct]=new Image();img[ct].src=src;}
};
$(function() {
  $("#global-nav a").addClass("ro");
  if (typeof(isIE6) == 'undefined') { $(".sub-nav a").addClass("ro");}
	
  /* roll over */
  $("a.ro").each(function() { loader.load($(this).children('img').attr('src').replace(/(\.[a-z]{3})$/i,"_on$1"));});
  $("a.ro").mouseover(function() {
    var src=$(this).children('img').attr('src');
		if (src.match(/_on\./)) { return;}
    $(this).children('img').attr('src', src.replace(/(\.[a-z]{3})$/i,"_on$1"));
  });
  $("a.ro").mouseout(function() {
    if ($(this).hasClass('selected')) { return;}
    var src=$(this).children('img').attr('src');
    $(this).children('img').attr('src', src.replace(/_on/,""));
  });
  
  $(".corner").corner("round 8px");

})

function navSelect(num) {
	t = "#global-nav #nav"+num+" a";
	src = $(t).children('img').attr('src');
	$(t).children('img').attr('src', src.replace(/(\.[a-z]{3})$/i,"_on$1"));
	$(t).addClass('selected');
}