var delay = 4500;
var slideshowSpeed = 1000;

$(function(){
    $("#head img:not(:first-child)").hide();
    $("#head img:first-child").addClass("showing");
        timeout = window.setTimeout(nextSlide, delay);


    $('#gnav li, #col0 li').css('cursor','pointer').click(function(e){
        e.stopPropagation(); 
        if(this.firstChild.href)window.location=this.firstChild.href;
    });
    $("a[rel=external]").live("click", function(){this.target="_blank"});
});

function nextSlide(){
    
    if( $("#head img.showing").nextAll().length==0 ) 
        next = $("#head img:first-child");
    else
        next = $("#head img.showing").next();
    
    $("img.showing").removeClass("showing").fadeOut( slideshowSpeed );
                   next.addClass("showing").fadeIn(  slideshowSpeed ,function(){ timeout = window.setTimeout(nextSlide, delay)});

}