/*
 * jQuery 3d Carousel plugin
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * tested with jQuery 1.4.2
 * written by Kae Verens: kae@webworks.ie
 */
(function( $ ){
	$.fn.k3dCarousel=function(options) {  
		return this.each(function() {
			var i=0, sin, position, newWidth, numitems, degs, zMax=0,
				positions=[],
				iter=0,
				w=this.offsetWidth,
				items=$(this).css('position','relative').find('img').css({
					"position" : 'absolute',
//					"opacity"  : 0.5,
					"display"  : 'block',
					"clip"     : '0 0 0 0'
				}),
				settings = {
					"r"  : w*.3, // radius of the carousel
					"cX" : w/2,  // center X of the carousel
					"cY" : this.offsetHeight/2, // center Y
					"sT" : 1000, // how long it takes to move from spot to spot
					"wT" : 2000  // how long to pause before moving again
				};
			if ( options ) { 
				$.extend( settings, options );
			}
			items.each(function(index,el){
				el.oW=el.offsetWidth;  // store the original with of the image
				el.oH=el.offsetHeight; // and the original height
				$(el).css({
					"left":settings.cX-el.oH/2,
					"top":0
				});
			});
			$('#k3dCarousel_screen li').each(function(){
			    $(this).css({'position':'absolute'});
			});
			numitems=items.length;
			degs=Math.PI/(numitems/2);
			for (; i<numitems; ++i) { // i initialised above
				sin=Math.sin(degs*i);
				positions.push({
					"l" : settings.cX+(Math.cos(degs*i)*settings.r),
					"z" : parseInt(50*sin+50),
					"t" : sin*10+10,
//					"o" : .45*sin+.55,
					"m" : .4*sin+.6
				});
				items[i]=$(items[i]);
				if(zMax <= parseInt(50*sin+50)){
				    zMax = parseInt(50*sin+50);
				}
				new Image().src = items[i].attr('src').replace('_off.', '_on.');
			}
			function setPositions(){
				for (i=0; i<numitems; ++i) {
					position=positions[i];
					newWidth=position.m*items[i][0].oW;
					items[(i+iter)%numitems].animate(
						{
							'left':    position.l-newWidth/2,
//							'opacity': position.o,
							'top':     position.t,
							'width':   newWidth,
							'height':  position.m*items[i][0].oH
						},
						settings.sT
						,function(){
        					if($(this).css('z-index') != zMax){
        					    $(this).attr('src', $(this).attr('src').replace('_on.', '_off.'));
        					    //if($.browser.msie){
        					    //    $(this).attr('style', $(this).attr('style').replace('_on.', '_off.'));
        					    //}
        					}/*else{
        					    $(this).attr('src', $(this).attr('src').replace('_off.', '_on.'));
        					    if($.browser.msie){
        					        $(this).attr('style', $(this).attr('style').replace('_off.', '_on.'));
        					    }
        					}*/
        					
						}
					)
					.css('z-index',position.z);
					
					if(position.z == zMax){
					    items[(i+iter)%numitems].attr('src', items[(i+iter)%numitems].attr('src').replace('_off.','_on.'));
					    //if($.browser.msie){
        			    //    items[(i+iter)%numitems].attr('style', items[(i+iter)%numitems].attr('style').replace('_off.', '_on.'));
        			    //}
					    $('#k3dCarousel_screen').find('.'+items[(i+iter)%numitems].attr('class')).show();

					    //img2
					    if(items[(i+iter)%numitems].attr('class') == 'img2'){
					        $('body').addClass('designer');
					    }else{
					        $('body').removeClass('designer');
					    }

					    //img3
					    if(items[(i+iter)%numitems].attr('class') == 'img3'){
					        $('body').addClass('programmer');
					    }else{
					        $('body').removeClass('programmer');
					    }

					    //img4
					    if(items[(i+iter)%numitems].attr('class') == 'img4'){
					        $('body').addClass('salesman');
					    }else{
					        $('body').removeClass('salesman');
					    }

					}else{
					    //items[(i+iter)%numitems].attr('src', items[(i+iter)%numitems].attr('src').replace('_on.','_off.'));
					    $('#k3dCarousel_screen').find('.'+items[(i+iter)%numitems].attr('class')).hide();
					}
				}
				
				
				iter++;
				setTimeout(setPositions,settings.wT+settings.sT);
			}
			setPositions();
		});
	};
})( jQuery );