$(document).ready(function(){
	
	// initialize fader
	$('nav#mainnavi ul li ul').hide();
    $('nav#mainnavi ul li').hover(
		function() { 
			var currentId = $(this).attr('id');
			if (currentId !== 'lectures') {
				$('ul', this).fadeIn('fast');
				$('ul', this).addClass('myhover');
				$(this).addClass('myhover');
			}
		},
		function() { 
			var currentId = $(this).attr('id');
			if (currentId !== 'lectures') {
				$('ul', this).fadeOut('fast');
				$('ul', this).removeClass('myhover');
				$(this).removeClass('myhover');
			}
	});
	
	// initialize scrollable
	$('.scrollable').scrollable({circular: true, mousewheel: true}).navigator().autoscroll({
		interval: 3000		
	});	
});

function clearText(thefield){
	if (thefield.defaultValue==thefield.value)
	thefield.value = ""
}