// JavaScript Document

function getWindowHeight() {
	var windowHeight = 0;
	if (typeof(window.innerHeight) == 'number') {
		windowHeight=window.innerHeight;
	} else {
		if (document.documentElement && document.documentElement.clientHeight) {
			windowHeight = document.documentElement.clientHeight;
		} else {
			if (document.body && document.body.clientHeight) {
				windowHeight = document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}

function getWindowWidth() {
	var windowWidth = 0;
	if (typeof(window.innerWidth) == 'number') {
		windowWidth=window.innerWidth;
	} else {
		if (document.documentElement && document.documentElement.clientWidth) {
			windowWidth = document.documentElement.clientWidth;
		} else {
			if (document.body && document.body.clientWidth) {
				windowWidth = document.body.clientWidth;
			}
		}
	}
	return windowWidth;
}

function popup(photo) {
	var largeur = getWindowWidth();
	var hauteur = getWindowHeight();
	var offsetx;
	var offsety;
	if (navigator.appName=="Microsoft Internet Explorer") {
		offsetx = document.documentElement.scrollLeft + (largeur - 310) / 2;
		offsety = document.documentElement.scrollTop + (hauteur - 310) / 2;
	} else {
		offsetx = window.pageXOffset + (largeur - 310) / 2;
		offsety = window.pageYOffset + (hauteur - 310) / 2;
	}

	zoom_image = new Image()
	zoom_image.src = "../images/" + photo + ".jpg";
	changeImage('zoom_photo', 'zoom_image');
	
	document.getElementById('layer_photo').style.left = offsetx + "px";
	document.getElementById('layer_photo').style.top = offsety + "px";
	showLayer('layer_photo');
}