// background gallery
$(document).ready(function(){		 
	
	var serverPath = "/";
	var imagesArr = new Array(
	"images/backgrounds/canada_water/2.jpg",
	"images/backgrounds/canada_water/3.jpg",
	"images/backgrounds/canada_water/hero.jpg",
	"images/backgrounds/elephant_and_castle/hero.jpg",
	"images/backgrounds/green_park/2.jpg",
	"images/backgrounds/green_park/3.jpg",
	"images/backgrounds/green_park/4.jpg",	
	"images/backgrounds/green_park/5.jpg", 
	"images/backgrounds/green_park/6.jpg",
	"images/backgrounds/green_park/hero.jpg",
	"images/backgrounds/greenwich_peninsula_quays/2.jpg",
	"images/backgrounds/greenwich_peninsula_quays/3.jpg",
	"images/backgrounds/greenwich_peninsula_quays/4.jpg",
	"images/backgrounds/greenwich_peninsula_quays/5.jpg",
	"images/backgrounds/greenwich_peninsula_quays/hero.jpg",
	"images/backgrounds/noho_square/2.jpg",
	"images/backgrounds/noho_square/3.jpg",
	"images/backgrounds/noho_square/5.jpg",
	"images/backgrounds/noho_square/hero.jpg",
	"images/backgrounds/paddington_basin/1.jpg",
	"images/backgrounds/paddington_basin/2.jpg",
	"images/backgrounds/paddington_basin/3.jpg",
	"images/backgrounds/paddington_basin/hero.jpg",
	"images/backgrounds/regents_place/2.jpg",
	"images/backgrounds/regents_place/3.jpg",
	"images/backgrounds/regents_place/4.jpg",
	"images/backgrounds/regents_place/5.jpg",
	"images/backgrounds/regents_place/6.jpg",
	"images/backgrounds/regents_place/7.jpg",
	"images/backgrounds/regents_place/hero.jpg",
	"images/backgrounds/st_helens/hero.jpg",
	"images/backgrounds/suffolk_college/hero.jpg",
	"images/backgrounds/triton_square/2.jpg",
	"images/backgrounds/triton_square/3.jpg",
	"images/backgrounds/triton_square/4.jpg",
	"images/backgrounds/triton_square/5.jpg",
	"images/backgrounds/triton_square/hero.jpg"
	);
	
	  var rand_no = Math.ceil((imagesArr.length-1)*Math.random())
	  var random_img = imagesArr[rand_no];
	  $('#bgEpandable').attr('src',serverPath+random_img);
	  var title = random_img.split('/');
		$('#project_title').html("<a href='/projects/"+title[2]+"'>"+title[2].replace(/([_]+)+/gi," ")+"</a>");
	  //$('#project_title').text(title[2].replace(/([_]+)+/gi," "));
		  
      $("a#btnBack").click(function(imagesArr){
			var serverPath = "/";
			var imagesArr = new Array(
				"images/backgrounds/canada_water/2.jpg",
				"images/backgrounds/canada_water/3.jpg",
				"images/backgrounds/canada_water/hero.jpg",
				"images/backgrounds/elephant_and_castle/hero.jpg",
				"images/backgrounds/green_park/2.jpg",
				"images/backgrounds/green_park/3.jpg",
				"images/backgrounds/green_park/4.jpg",	
				"images/backgrounds/green_park/5.jpg", 
				"images/backgrounds/green_park/6.jpg",
				"images/backgrounds/green_park/hero.jpg",
				"images/backgrounds/greenwich_peninsula_quays/2.jpg",
				"images/backgrounds/greenwich_peninsula_quays/3.jpg",
				"images/backgrounds/greenwich_peninsula_quays/4.jpg",
				"images/backgrounds/greenwich_peninsula_quays/5.jpg",
				"images/backgrounds/greenwich_peninsula_quays/hero.jpg",
				"images/backgrounds/noho_square/2.jpg",
				"images/backgrounds/noho_square/3.jpg",
				"images/backgrounds/noho_square/5.jpg",
				"images/backgrounds/noho_square/hero.jpg",
				"images/backgrounds/paddington_basin/1.jpg",
				"images/backgrounds/paddington_basin/2.jpg",
				"images/backgrounds/paddington_basin/3.jpg",
				"images/backgrounds/paddington_basin/hero.jpg",
				"images/backgrounds/regents_place/2.jpg",
				"images/backgrounds/regents_place/3.jpg",
				"images/backgrounds/regents_place/4.jpg",
				"images/backgrounds/regents_place/5.jpg",
				"images/backgrounds/regents_place/6.jpg",
				"images/backgrounds/regents_place/7.jpg",
				"images/backgrounds/regents_place/hero.jpg",
				"images/backgrounds/st_helens/hero.jpg",
				"images/backgrounds/suffolk_college/hero.jpg",
				"images/backgrounds/triton_square/2.jpg",
				"images/backgrounds/triton_square/3.jpg",
				"images/backgrounds/triton_square/4.jpg",
				"images/backgrounds/triton_square/5.jpg",
				"images/backgrounds/triton_square/hero.jpg"
			);
									
			var currentSrc = $("img#bgEpandable").attr("src");
			
			var foundIdx = 0;
			for(var i=0; i<imagesArr.length; i++){
				if( (serverPath+imagesArr[i]) == currentSrc){				  
					foundIdx = i;
					break;
				}
			}
			
			foundIdx = (foundIdx > 0)? (foundIdx-1):(imagesArr.length-1);			
			$("img#bgEpandable").attr(   {src:serverPath+imagesArr[foundIdx] }  );
			
		  var title = imagesArr[foundIdx].split('/');
		 	 $('#project_title').html("<a href='/projects/"+title[2]+"'>"+title[2].replace(/([_]+)+/gi," ")+"</a>");
			
        });
		
		$("a#btnNext").click(function(){
			var serverPath = "/";
			var imagesArr = new Array(
				"images/backgrounds/canada_water/2.jpg",
				"images/backgrounds/canada_water/3.jpg",
				"images/backgrounds/canada_water/hero.jpg",
				"images/backgrounds/elephant_and_castle/hero.jpg",
				"images/backgrounds/green_park/2.jpg",
				"images/backgrounds/green_park/3.jpg",
				"images/backgrounds/green_park/4.jpg",	
				"images/backgrounds/green_park/5.jpg", 
				"images/backgrounds/green_park/6.jpg",
				"images/backgrounds/green_park/hero.jpg",
				"images/backgrounds/greenwich_peninsula_quays/2.jpg",
				"images/backgrounds/greenwich_peninsula_quays/3.jpg",
				"images/backgrounds/greenwich_peninsula_quays/4.jpg",
				"images/backgrounds/greenwich_peninsula_quays/5.jpg",
				"images/backgrounds/greenwich_peninsula_quays/hero.jpg",
				"images/backgrounds/noho_square/2.jpg",
				"images/backgrounds/noho_square/3.jpg",
				"images/backgrounds/noho_square/5.jpg",
				"images/backgrounds/noho_square/hero.jpg",
				"images/backgrounds/paddington_basin/1.jpg",
				"images/backgrounds/paddington_basin/2.jpg",
				"images/backgrounds/paddington_basin/3.jpg",
				"images/backgrounds/paddington_basin/hero.jpg",
				"images/backgrounds/regents_place/2.jpg",
				"images/backgrounds/regents_place/3.jpg",
				"images/backgrounds/regents_place/4.jpg",
				"images/backgrounds/regents_place/5.jpg",
				"images/backgrounds/regents_place/6.jpg",
				"images/backgrounds/regents_place/7.jpg",
				"images/backgrounds/regents_place/hero.jpg",
				"images/backgrounds/st_helens/hero.jpg",
				"images/backgrounds/suffolk_college/hero.jpg",
				"images/backgrounds/triton_square/2.jpg",
				"images/backgrounds/triton_square/3.jpg",
				"images/backgrounds/triton_square/4.jpg",
				"images/backgrounds/triton_square/5.jpg",
				"images/backgrounds/triton_square/hero.jpg"
			);
									
			var currentSrc = $("img#bgEpandable").attr("src");
			
			var foundIdx = 0;
			for(var i=0; i<imagesArr.length; i++){
				if(serverPath+imagesArr[i] == currentSrc){				  
					foundIdx = i;
					break;
				}
			}
			
			foundIdx = ( foundIdx < (imagesArr.length-1) )? (foundIdx+1):0;			
			$("img#bgEpandable").attr(   {src:serverPath+imagesArr[foundIdx] }  );
			//alert("currentSrc : " + currentSrc + "  new pic["+foundIdx+"]= " + imagesArr[foundIdx]);		
			var title = imagesArr[foundIdx].split('/');
				$('#project_title').html("<a href='/projects/"+title[2]+"'>"+title[2].replace(/([_]+)+/gi," ")+"</a>");
		
		});
		        
});