function contact() {
	if(document.getElementById("contact").style.display == "none" || document.getElementById("contact").style.display == ""){
		document.getElementById("contact").style.display = "block";
		document.getElementById("contact-button").className = "contact-button-active";
	}
	else {
		document.getElementById("contact").style.display = "none";
		document.getElementById("contact-button").className = "";
	}
}

function setFooterPosition() {
	if (document.body.offsetHeight+30 > document.documentElement.clientHeight) {
		document.getElementById("footer").style.position = "relative";
		document.getElementById("footer").style.left = 0;
	} else {
		document.getElementById("footer").style.position = "absolute";
		
		if(document.body.offsetWidth > 1000){
			var footercenter = (document.body.offsetWidth - 1000) / 2;
			document.getElementById("footer").style.left = footercenter + "px";
		}
	}
}

function setHeightFlash() {
	var heightFlash = (document.body.offsetWidth * 367) / 1280;

	if (heightFlash < 367) {
		heightFlash = 367; 
	}
	
	if (heightFlash > 570) {
		heightFlash = 570;
	}
	
	if (heightFlash >= 367 && heightFlash <= 570){
		document.getElementById("concept").style.height = heightFlash + "px";
	}
}