window.addEvent('domready', function() {
		
		$('project_two').setStyle('opacity', 0);
		$('project_three').setStyle('opacity', 0);
		$('project_four').setStyle('opacity', 0);
		
		var current = $('project_one');
		var currentButton = $('project_one_button');

			$('project_one_button').addEvent('click', function(e) {
				e.stop();
				
				if(	current != $('project_one') )
				{
				current.fade(0,0);
				$('project_one').fade(0, 1);
				
				$('project_one_button').set('class', 'current');
				currentButton.set('class', '');

				}
				current = $('project_one');
				currentButton = $('project_one_button');
			});



			$('project_two_button').addEvent('click', function(e) {
				e.stop();
				
				if(	current != $('project_two') )
				{
				current.fade(0,0);
				$('project_two').fade(0, 1);
				$('project_two_button').set('class', 'current');
				currentButton.set('class', '');
				}
				current = $('project_two');
		 		currentButton = $('project_two_button');
			
			});
	
			$('project_three_button').addEvent('click', function(e) {
				e.stop();
				if(	current != $('project_three') )
				{
				current.fade(0,0);
				$('project_three').fade(0, 1);
				$('project_three_button').set('class', 'current');
					currentButton.set('class', '');
				}
				current = $('project_three');
				currentButton = $('project_three_button');
			});
			
			$('project_four_button').addEvent('click', function(e) {
				e.stop();
				if(	current != $('project_four') )
				{
				current.fade(0,0);
				$('project_four').fade(0, 1);
				$('project_four_button').set('class', 'current');
				currentButton.set('class', '');
				
				}
				current = $('project_four');
				currentButton = $('project_four_button');
			});

		
});