var imgArray = $(".techgallery") ; 
var curImg = false;
var imgLength = imgArray.length;
var fadeValue = 30;
					
function imgFwd(){ 
	nextImg = curImg + 1;
	if(nextImg >= imgLength){
		//nextImg = 0;
	} else {
		changeImg (nextImg);
	}
}

function imgBack(){
	nextImg = curImg - 1;
	if(nextImg < 0){
		//nextImg = imgLength - 1;
	} else {
		changeImg (nextImg);
	}
}


function changeImg (imgId){
	$("#loadingtech").fadeIn("fast");
	$(".techgallery:visible").fadeOut("slow", function (){ 
		$(".techgallery:eq("+imgId+")").fadeIn("slow", function () {
			$("#loadingtech").fadeOut("fast");
		});
	});
	curImg = imgId;
	if(imgId == 0){
		$("#t_back").attr("src", "/img/arrow_left_inactive.gif"); 
	} else {
		$("#t_back").attr("src", "/img/arrow_left_active.gif"); 
	}
	if(imgId == (imgLength - 1)){
		$("#t_fwd").attr("src", "/img/arrow_right_inactive.gif");
	} else {
		$("#t_fwd").attr("src", "/img/arrow_right_active.gif");
	}
	
}

$(document).ready(function () {
	$(".techgallery:first").show();
	if(imgLength > 1 ){
		curImg = 0;
		$("#techimgnav").show(); 
		$("#t_back").bind("click", function(){ imgBack(); });
		$("#t_fwd").bind("click", function(){ imgFwd(); });
	}
});