path = "photo/";

var n = "blank";

ext = ".jpg";

var x = "blank";

var isVisible="false";



function checkVis(){

		if(document.getElementById('gallery').style.visibility == 'visible'){

		isVisible="visible";

		}

		else {

		isVisible="hidden";

		}

}



function changeImage(n, caption){

	checkVis();	

		if(isVisible=="hidden"){

			document.getElementById("loading").style.visibility = "visible";

			document.getElementById("gallery").style.visibility = "visible";

			document.getElementById("contents").style.visibility = "hidden";

			document.imgSrc.src = n;
			
			document.getElementById('caption').innerHTML= "<text>" + caption + "</text>";

			}

}



function changeVis(n){

	checkVis();	

		if(isVisible=="hidden"){

			document.getElementById("loading").style.visibility = "visible";

			document.getElementById("gallery").style.visibility = "visible";

			document.getElementById("contents").style.visibility = "hidden";
			
			document.getElementById("mini_menu").style.visibility = "hidden";

			document.imgSrc.src = path + image[n] + ext;

			i=n;
			
			document.getElementById('caption').innerHTML= "<text>" + caption[i] + "</text>";

			}

	else {

			document.getElementById("gallery").style.visibility = "hidden";

			document.getElementById("contents").style.visibility = "visible";

			document.imgSrc.src = path + "images/blank.png";

			document.getElementById("loading").style.visibility = "hidden";
			
			document.getElementById("mini_menu").style.visibility = "visible";

			}

}



function aspect(){

	if (document.imgSrc.height > document.body.clientHeight){

		document.imgSrc.style.height="95%";

		document.imgSrc.style.width="";

	}

	else if (document.imgSrc.width > document.body.clientWidth){

		document.imgSrc.style.width="95%";

		document.imgSrc.style.height="";

	}
	
}



function next(){

	if(i<end){

		i = i + 1;

		document.imgSrc.src = path + image[i] + ext;

		document.getElementById('caption').innerHTML= "<text>" + caption[i] + "</text>";

		document.getElementById("loading").style.visibility = "visible";

		}

}



function last(){

	if(i>0){

		i = i -  1;

		document.imgSrc.src = path + image[i] + ext;

		document.getElementById('caption').innerHTML="<text>" + caption[i] + "</text>";

		document.getElementById("loading").style.visibility = "visible";

		}

}

		

function loaded(){

	window.setTimeout(hideloader, 250);

	aspect();

}



function hideloader(){

	document.getElementById("loading").style.visibility = "hidden";

}