$(document).ready(function() {	

	//select all the a tag with name equal to modal
	$('a[name=modal]').click(function(e) {
		//Cancel the link behavior
		e.preventDefault();
		
		//Get the A tag
		var id = $(this).attr('href');
	
		//Get the screen height and width
		var maskHeight = $(document).height();
		var maskWidth = $(window).width();
	
		//Set heigth and width to mask to fill up the whole screen
		$('#mask').css({'width':maskWidth,'height':maskHeight});
		
		//transition effect		
		$('#mask').fadeIn(1000);	
		$('#mask').fadeTo("slow",0.8);	
	
		//Get the window height and width
		var winH = $(window).height();
		var winW = $(window).width();
              
		//Set the popup window to center
		$(id).css('top',  winH/2-$(id).height()/2);
		$(id).css('left', winW/2-$(id).width()/2);
	
		//transition effect
		$(id).show();
		
		

	
	});
	
	//if close button is clicked
	$('.window .close').click(function (e) {
		//Cancel the link behavior
		e.preventDefault();
		
		$('#mask').hide();
		$('.window').hide();
	});		
	
	//if mask is clicked
	$('#mask').click(function () {
		$(this).hide();
		$('.window').hide();
	});			
	function back(rel) {
		if(rel==12){
			$('#right-arrow').show();
		}
		if(rel==0){
			$('#left-arrow').hide();
			$('#right-arrow').attr('rel',1);
			mymove(0);
		} else {
			mymove(rel);
		}	
	}
	
	function forward(rel) {
		if(rel==1){
			$('#left-arrow').show();
		}
		if(rel==13){
			$('#right-arrow').hide();
			$('#left-arrow').attr('rel',12);
			mymove(13);
		} else {
			mymove(rel);
		}	
	}
	
	function mymove(rel){
		val=640*rel;
		$('#window-content #my').css('right',val)
		var rs;
		var ls;
		ls=rel;
		rs=rel;
		ls--;
		rs++;
		$('#right-arrow').attr('rel',rs);
		$('#left-arrow').attr('rel',ls);
	}
	$('#window-navigation a').click(function(e) {
		e.preventDefault();
		var rel;
		rel=$(this).attr('rel');
		var id;
		id=$(this).attr('id');
		if(id=="left-arrow"){
			back(rel);
		} else {
			forward(rel);
		}
	})	
});