// JavaScript Document
<!--

//////////////////////////////////////////////////////
//var currentLayer = 'balt2_1'; 
function showLayer(lyr) { //lyr = 'page4'
hideLayer(currentLayer); //"currentlayer" is a global variable
document.getElementById(lyr).style.display = "block";
//window.scroll(0,0); //puts user at the top of each page
currentLayer = lyr;
}//end showLayer


//////////////////////////////////////////////////////
function hideLayer(lyr) {
document.getElementById(lyr).style.display = "none";
}


//////////////////////////////////////////////////////
function moveLayer(move,numpics) {
//find current layer number
if (currentLayer.length==8) {
	var getit=parseInt(currentLayer.substr(6,2));
} else {
	var getit=parseInt(currentLayer.substr(6,1));
}

//Calculate new layer number
var newit=0; //initialize
if (move=='prev') {
	if (getit==1) {newit=1;} else {newit=getit-1;}
} else {
	if (getit==numpics) {newit=numpics;} else {newit=getit+1;}
}
newlayer=currentLayer.substr(0,6) + newit;

//show appropriate layer
showLayer(newlayer);
}


//-->