function showAd() {
    $('#ad').css('left', $(window).width()/2 - $('#ad').width()/2); 
    $('#ad').fadeIn("fast")
}

function hideAd() {
    $('#ad').fadeOut("fast")
}

function tocopen(item){
    var target,openitem;
    for(target=2;target<5;target++){
    
      if ($('#tocitem'+target+'>a>img').attr("src")=="images/toc_"+target+"_selected.jpg"){
          $('#itemlist'+target).slideUp("slow");
          $('#tocitem'+target+'>a>img').attr("src","images/toc_"+target+".jpg");
          openitem = target;
      }
    }
    if (openitem != item){
        $('#itemlist'+item).slideDown("slow");
        $('#tocitem'+item+'>a>img').attr("src","images/toc_"+item+"_selected.jpg");
    }
}

function load_ad(adnum){
    $('#adpic>img').attr("src","images/ad"+adnum+".jpg");
    $('#adtext>h1').text(eval('adhead'+adnum));
    $('#adtext>p').text(eval('adcopy'+adnum));
    $('#adbody').html(eval('adbody'+adnum));
    if($('#adbody').css('display')=='none'){
      toggle_ad();
    }
}

function toggle_ad(){
   if($('#adbody').css('display')=='none'){
        $('#adtext').css('background-image', 'url("images/adtextbkgselected.jpg")')
        $('#adbody').css('display','block');
    }
    else {
        $('#adtext').css('background-image', 'url("images/adtextbkg.jpg")')
        $('#adbody').css('display','none');
    }
}

$(document).ready(function ()
	{
		// add over event to navigation items that contain subnavigation
		$("#navigation ul li:has(ul)").hover(function ()
			{
				$("ul", this).addClass("hover").css("top", this.offsetHeight + "px");
			},
			function ()
			{
				$("ul", this).removeClass("hover");
			}
		);
		
		if($('#rightcolumn').length == 0) {
				$('#middlecolumn').css("width", "540" + "px");	
		}
	}
);

function changeLink(currentDiv){
	var newlink = currentDiv.find("input.itemurl").val();
	window.location = newlink;
}