$(function() {
					 
    $('#main').css('min-height', $(window).height());

    if ( $.browser.msie ) {
        if ( $.browser.version > 6.0 )
        {
            $(window).bind('resize', function() {
                $('#main').css('min-height', $(window).height());
            });
        }
    } else {
        $(window).bind('resize', function() {
            $('#main').css('min-height', $(window).height());
        });
    }

 	$.preload('#nav ul li ul li img');
	
	$('#nav img.rollover').preload({
		find:'.jpg',
	    replace:'-on.jpg'
	});
    
	$('#nav img').hover(function(){
		if (this.className == 'rollover') {
			this.src = this.src.replace('.jpg','-on.jpg');
		}
	},function(){
		if (this.className == 'rollover') {
			this.src = this.src.replace('-on','');
		}
	});
});


var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;

function nav_open()
{  
   nav_canceltimer();
   nav_close();
   ddmenuitem = $(this).find('ul').css('visibility', 'visible');
}

function nav_close()
{  
	if(ddmenuitem) 
		ddmenuitem.css('visibility', 'hidden');
}

function nav_timer()
{  
	closetimer = window.setTimeout(nav_close, timeout);
}

function nav_canceltimer()
{  
	if(closetimer) {  
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

$(document).ready(function()
{  $('#nav > li').bind('mouseover', nav_open)
   $('#nav > li').bind('mouseout',  nav_timer)});

document.onclick = nav_close;