var scrollHandler = 0;
var step = 7;
var pagestep = 380;
var div = 0;
var loaded = 0;
var posy = 0;
var clipHeight = 0;

function init() {
	div = document.getElementById("contentleft_inner");
	loaded = 1;
	clipHeight = 400;
}

function changeMainPageContent(show) {
	var img, imgA;
/*	for (i=1;i<5;i++) {
		img = document.getElementById("contentimg" + i);
		imgA = document.getElementById("contentimg" + i + "a");
		if (show) {
			img.style.display = "none";
			imgA.style.display = "block";
		} else {
			img.style.display = "block";
			imgA.style.display = "none";
		}
	}*/
	img = document.getElementById("contentimg");
	imgA = document.getElementById("contentimga");
	if (show) {
		img.style.display = "none";
		imgA.style.display = "block";
	} else {
		img.style.display = "block";
		imgA.style.display = "none";
	}
	return true;
}


function bold(num) {
	var img = document.getElementById("leftmenuimg" + num);
	var img2 = document.getElementById("leftmenuimg" + num + "_bold");
	img.style.display = "none";
	img2.style.display = "block";
	return true;
}

function light(num) {
	var img = document.getElementById("leftmenuimg" + num);
	var img2 = document.getElementById("leftmenuimg" + num + "_bold");
	img.style.display = "block";
	img2.style.display = "none";
	return true;
}

function showBigImage(num) {
	var img = document.getElementById("contentleftbigimage");
	img.src = "../ftp/" + num + ".jpg";
	if (num == 1) {
		img.style.width = 210;
		img.style.height = 316;
	} else {
		img.style.width = 295;
		img.style.height = 197;
	}
	return true;
}

function scrollUp() {
	if (!loaded) { return; }
	if (posy >= 0) {
		posy = 0;
		return;
	}
	posy += step;
	div.style.top = posy + "px";

	scrollHandler = setTimeout("scrollUp()", 10);
}

function scrollDown() {
	if (!loaded) { return; }
	if (posy < -div.offsetHeight + clipHeight - 10) return;
    posy -= step;
    div.style.top = posy + "px";
	//alert(div.style.top);
	scrollHandler = setTimeout("scrollDown()", 10);
}

function stopScrolling() {
	if (!loaded) { return; }
	if (scrollHandler) clearInterval(scrollHandler);
	scrollHandler = 0;
}

function scrollPageUp() {
	if (!loaded) { return; }
	if (posy >= 0) {
		posy = 0;
		return;
	}
	posy += pagestep;
	div.style.top = posy + "px";
	return true;
}

function scrollPageDown() {
	if (!loaded) { return; }
	if (posy < -div.offsetHeight + clipHeight - 10) return;
    posy -= pagestep;
    div.style.top = posy + "px";
	return true;
}



function changeMainPageContent(show) {
	var img, imgA;
	img = document.getElementById("main_foto");
	if (show) {
		img.src = "../ftp/design/iright-over.jpg";
	} else {
		img.src = "../ftp/design/iright.jpg";
	}
	return true;
}