var site_url = '';
var nav  = [ '#home', '#wir', '#leistungen', '#refer', '#ablauf', '#kontakt', '#links', '#impress' ];

$(document).ready(function(){
	setBkgPos();
	

  $("#navigation > div").each(function(){
		$(this).bind( 'mouseover', mMouseOver );
		$(this).bind( 'mouseout', mMouseOut );
		$(this).bind( 'click', mClick );
  });

	$("#navigation > div.active").each(function(){
    $(this).animate({ backgroundPosition:'(' + _getHPos( $(this).attr("id") ) +' -30px}'},"fast",
      function(){

        $(this).children()
          .animate({backgroundPosition:'(0px -40px)'},20)
          .animate({backgroundPosition:'(0px -20px)'},"fast");

        $(this)
          .animate({backgroundPosition:'(' + _getHPos( $(this).attr("id") ) +' 50px)'},"fast")
          .animate({backgroundPosition:'(' + _getHPos( $(this).attr("id") ) +' 25px)'},"fast");

        $(this).children()
          .animate( {backgroundPosition:'(0px -45px)'},"fast",
            function(){
              $(parent).animate({backgroundPosition:'(' + _getHPos( $(this).parent().attr("id") ) +' 25px)'},"fast");
              $(parent).css({backgroundImage: 'url(images/nav.png)'});
            });
      });
    });
}); 

function _getHPos( id )
{
	for ( i = 0; i < nav.length; i++ ){
		if ( '#' + id == nav[i] ){
			return i*(-98);
		}
	}	
	
	return 0;
}

function setBkgPos()
{
	for ( i = 0; i < nav.length; i++ ){
		$(nav[i]).css({backgroundPosition: i*(-98) + 'px -25px'});
		$(nav[i] + ' div').css({ backgroundPosition: '0px -60px'});
	}
}

function mMouseOver(e)
{

	if ( this.className.indexOf('active') >= 0  ){
		return;
	}
	
	$(this)
	
		.stop()
		
		.css({backgroundImage: 'url(images/nav.png)',cursor: 'pointer'})
		// step.2 move up the navigation item a bit
		.animate({ backgroundPosition:'(' + _getHPos( this.id ) +' -30px}'},"fast",
			// this section will be executed after the step.2 is done
			function(){ 
				$(this)
					.children()
						// step. 3 move the white box down
						.animate({backgroundPosition:'(0px -40px)'},20)
						// step 4. move the white box down
						.animate({backgroundPosition:'(0px -20px)'},"fast");
				$(this)
					// step 4. move the navigation item down
					.animate({backgroundPosition:'(' + _getHPos( this.id ) +' 50px)'},"fast")
					// step 5. move the navigation item to its final position
					.animate({backgroundPosition:'(' + _getHPos( this.id ) +' 25px)'},"fast");
				// store the parent element id for later usage
				var parent = this;
				$(this)
					.children()
						// step 5. move the white box to its final position
						.animate( {backgroundPosition:'(0px -45px)'},"fast",
							// this section will be executed after the step.5 is done
							function(){
								// step.6 change the image to its original image	
								$(parent).css({backgroundImage: 'url(images/nav.png)'});
							});
			
			});
}

function mMouseOut(e)
{			
	// element with ?active? class will ignore this event and do nothing
	if ( this.className.indexOf('active') >= 0  ){
		return;
	}
	
	$(this)
		// stop any animation that took place before this
		.stop()
		// step.1 move down navigation item
		.animate({backgroundPosition:'(' + _getHPos( this.id ) +' 40px )'}, "fast", 
			// this section will be executed after the step.1 is done
			function(){
				// step.2 white box move really fast
				$(this).children().animate({backgroundPosition:'(0px 70px)'}, "fast");
				// step 3. move navigation item up
				$(this).animate( {backgroundPosition:'(' + _getHPos( this.id ) +' -40px)'}, "fast", 
					// this section will be executed after the step.3 is done
					function(){
						// step 4. move navigation item ot its original position
						$(this).animate( {backgroundPosition:'(' + _getHPos( this.id ) +' -25px)'}, "fast",
							// this section will be executed after the step.4 is done
							function(){
								// move white box to its original position, ready for next animation
								$(this).children().css({ backgroundPosition:'0px -60px'});
							})
					})
			})
		.css({backgroundImage: 'url(images/nav.png)', cursor: ''});
}

function mClick(e)
{
	location.href = $(this).children().children().attr("href");
}