function On(divName){
	document.getElementById(divName).style.visibility = "visible";
	}

function Off(divName){
	document.getElementById(divName).style.visibility = "hidden";
	}


var tmpPic = new Image();

var pics = new Array();
var descs = new Array();

var galcat;

var curPic = 0;

function replaceImage(){
	document.getElementById('zoomImg').src = tmpPic.src;
	}

function prevPic(imgSrc){
	document.getElementById('zoomImg').src = "pic/null.png";
	curPic--;
	document.getElementById('zoomDesc').innerHTML = "<b>" + galcat + ":</b> " + descs[curPic];
	On('nextPic');
	if(curPic==0){
		Off('prevPic');
		}
	tmpPic.src = pics[curPic];
	tmpPic.onload = replaceImage;
	}

function nextPic(imgSrc){
	document.getElementById('zoomImg').src = "pic/null.png";
	curPic++;
	document.getElementById('zoomDesc').innerHTML = "<b>" + galcat + ":</b> " + descs[curPic];
	On('prevPic');
	if(curPic==pics.length-1){
		Off('nextPic');
		}
	tmpPic.src = pics[curPic];
	tmpPic.onload = replaceImage;
	}
	
function showPic(i, imgSrc){
	Off('containerDiv');
	document.getElementById('zoomDesc').innerHTML = "<b>" + galcat + ":</b> " + descs[i];
	curPic = i;
	On('zoomMaskDiv');
	On('closeZoomDiv');
	On('zoomImgDiv');
	if(i==0){
		Off('prevPic');
		}
	 else On('prevPic');
	if(i==pics.length-1){
		Off('nextPic');
		}
	 else On('nextPic');
	tmpPic.src = imgSrc;
	tmpPic.onload = replaceImage;
	}

function hidePic(){
	Off('prevPic');
	Off('nextPic');
	Off('zoomMaskDiv');
	Off('closeZoomDiv');
	Off('zoomImgDiv');
	document.getElementById('zoomImg').src = "pic/null.png";
	On('containerDiv');
	}