var ig__count       = 0;
var ig_interval_mng = 0;
var ig__move_speed  = 10;
var ig__int_speed   = 30;
var ig__total_width = null;
var ig__total_height = null;

function moveGallery(dir){
	clearInterval(ig_interval_mng);
	if(dir == "left"){
		ig_interval_mng = setInterval(moveGalleryLeft,ig__int_speed);
	}else if(dir == "right"){
		ig_interval_mng = setInterval(moveGalleryRight,ig__int_speed);
	}else if(dir == "up"){
		ig_interval_mng = setInterval(moveGalleryUp,ig__int_speed);
	}else if(dir == "down"){
		ig_interval_mng = setInterval(moveGalleryDown,ig__int_speed);
	}
}

function moveGalleryLeft(){
	var target = document.getElementById("ig_move_me");
	var target_parent = document.getElementById("ig_conv_cont");
	if(ig__total_width == null){ig__total_width = target_parent.scrollWidth;}
	if(target.style.left.split("px")[0] > target_parent.clientWidth-ig__total_width){
		ig__count--;
		target.style.left = (ig__count*ig__move_speed)+"px";
	}else{
		clearInterval(ig_interval_mng);		
	}
}

function moveGalleryRight(){	
	var target = document.getElementById("ig_move_me");
	if(ig__count<0){
		ig__count++;
		target.style.left = (ig__count*ig__move_speed)+"px";
	}else{
		clearInterval(ig_interval_mng);
	}
}

function moveGalleryDown(){
	var target = document.getElementById("ig_move_me");
	var target_parent = document.getElementById("ig_conv_cont");
	if(ig__total_height == null){ig__total_height = target_parent.scrollHeight;}
	if(target.style.top.split("px")[0] > target_parent.clientHeight-ig__total_height){
		ig__count--;
		target.style.top = (ig__count*ig__move_speed)+"px";
	}else{
		clearInterval(ig_interval_mng);
	}
}

function moveGalleryUp(){
	var target = document.getElementById("ig_move_me");
	if(ig__count<0){
		ig__count++;
		target.style.top = (ig__count*ig__move_speed)+"px";
	}else{
		clearInterval(ig_interval_mng);
	}
}

function show_large_img(img){
	document.getElementById("large_image").src = img;
}