//Gallery swap image code.
var param = location.search;
var equal_sign = param.indexOf("img=")
var tname = param.substring(equal_sign+4,param.length)
if(equal_sign==-1){
	tname="";
}
function load_images(){
	var y
	var holdlast = total_img; //10
	var check_prev = false;
	var check_next = false;
	if (tname==""){
		y = holdlast;
		document.getElementById("prevdiv").style.visibility='hidden'
	}else{
		y = tname
		if (tname >= holdlast){
			document.getElementById("prevdiv").style.visibility='hidden'
		}else{
			document.getElementById("prevdiv").style.visibility='visible'
		}
		if (tname <=3){
			document.getElementById("nextdiv").style.visibility='hidden'
		}
	}
	//first image display in main window and in thumbnail
	if (y <= holdlast){
		document.gallery_main.src = "../../images/gallery_ss/" + img_prefix + (y) + ".jpg";
		document.gallery0.src = "../../images/gallery_ss/" + img_prefix + (y) + "s.jpg";
		document.gallery_main.title = alt_array[y]
		document.gallery0.title = alt_array[y]
		document.getElementById("desc").innerHTML = alt_array[y]
	}else{
		document.gallery_main.src = "../../images/gallery_ss/blank.gif"
		document.gallery0.src = "../../images/gallery_ss/blank.gif";
	}
	// second image display in thumbnail
	if (y-1 < 0 || y - 1 > holdlast){
		document.gallery1.src = "../../images/gallery_ss/blank.gif";
	}else{
		document.gallery1.src = "../../images/gallery_ss/" + img_prefix + (y-1) + "s.jpg";
		document.gallery1.title = alt_array[y-1]
	}
	if( y - 1 == holdlast){
		document.gallery_main.src ="../../images/gallery_ss/" + img_prefix + (y-1) + ".jpg";
		document.gallery_main.title = alt_array[y-1]
		document.getElementById("desc").innerHTML = alt_array[y-1]
	}
	// third image display in thumbnail
	if (y-2 < 0 || y - 2 > holdlast){
		document.gallery2.src = "../../images/gallery_ss/blank.gif";
	}else{
		document.gallery2.src = "../../images/gallery_ss/" + img_prefix + (y-2) + "s.jpg";
		document.gallery2.title = alt_array[y-2]
	}
	if( y - 2 == holdlast){
		document.gallery_main.src ="../../images/gallery_ss/" + img_prefix + (y-2) + ".jpg";
		document.gallery_main.title = alt_array[y-2]
		document.getElementById("desc").innerHTML = alt_array[y-2]
	}
	//fourth image display in thumbnail
	if (y-3 < 0 || y - 3 > holdlast){
		document.gallery3.src = "../../images/gallery_ss/blank.gif";
	}else{
		document.gallery3.src = "../../images/gallery_ss/" + img_prefix + (y-3) + "s.jpg";
		document.gallery3.title = alt_array[y-3]
	}
	if( y - 3 == holdlast){
		document.gallery_main.src ="../../images/gallery_ss/" + img_prefix + (y-3) + ".jpg";
		document.gallery_main.title = alt_array[y-3]
		document.getElementById("desc").innerHTML = alt_array[y-3]
	}
	var s_next = y - 4
	var s_prev = parseInt(y) + parseInt(4)
	for(n=0;n<document.links.length;n++){
		if (document.links[n].name == "next_page"){
			document.links[n].href = html_filename+"?img="+s_next+"#gallery"
		}
		if (document.links[n].name == "prev_page"){
			document.links[n].href = html_filename+"?img="+s_prev+"#gallery"
		}
	}
}

function swap_img(num){
	var str = eval("document.gallery"+num+".src")
	var ind_1 = str.lastIndexOf("/")
	var file_name = str.substring(ind_1+1,str.length)
	if(file_name == "blank.gif"){
		return
	}
	var ind_2 = file_name.lastIndexOf("s")
	var file_num = file_name.substring(0,ind_2)
	document.getElementById('gallery_main').src = "../../images/gallery_ss/" + file_num + ".jpg";
	file_num = (file_num.substr(file_num.lastIndexOf("_") +1, file_num.length - file_num.lastIndexOf("_")));
	document.getElementById('gallery_main').title = alt_array[file_num]
	document.getElementById("desc").innerHTML = alt_array[file_num]
}