function checkfields(what, on) {
	for(i in what.form.elements) {
		if(what.form.elements[i].type == "checkbox") {
			if(what.form.elements[i].name.substr(0, 1) == "m") {
				if(on && what.checked) {
					what.form.elements[i].checked = "";
				}
			} else {
				if(!on && what.checked) {
					what.form.elements[i].checked = "";
				}
			}
		}
	}
}
var num = 1, use = 1, image1, image2, useIds = false;
function initHeader() {
	image1 = document.getElementById("image1");
	image2 = document.getElementById("image2");
	if(typeof(headerimages) != "undefined") {
		setTimeout("doStart()", 3000);
	}
	if(typeof(headerimageIds) != "undefined") {
		useIds = true;
	}
}
var useImage, tim, opa, speed;
function doStart() {
	num++;
	if(num >= headerimages.length) {
		num = 0;
	}
	if(use == 1) {
		useImage = image1;
		use = 2;
	} else {
		useImage = image2;
		use = 1;
	}
	opa = 100;
	speed = -4;
	tim = setInterval("sethide()", 39);
}

function sethide() {
	opa = opa + speed;
	if(opa <= 0) {
		opa = 0;
		clearInterval(tim);
		useImage.src = headerimages[num];
		if(useIds) {
			useImage.parentNode.href = headerimageIds[num];
		}
		speed = 4;
		tim = setInterval("setshow()", 39);
	}
	useImage.style.opacity = opa/100;
}
function setshow() {
	opa = opa + speed;
	if(opa >= 100) {
		opa = 99;
		clearInterval(tim);
		setTimeout("doStart()", 3000);
	}
	useImage.style.opacity = opa/100;
}