//ZOOM IMAGE
function show_image_zoom(image) {
	document.getElementById('grand_contenu').innerHTML += '<div id="image_zoom"></div>';
	c = document.getElementById('image_zoom');
	c.innerHTML = '<img src="'+image+'" onclick="close_zoom();"/>';
	c.style.display='block';
	installBackground();
}

function close_zoom() {
	c = document.getElementById('image_zoom');
	c.style.display='none';
	desinstallBackground();
}

// HAUTEUR TOTALE DE LA PAGE
function getTotalHeightPage() {
	var h = document.documentElement.scrollHeight;
	if(document.documentElement.clientHeight > h ) {
		h  = document.documentElement.clientHeight;
	}
	if(document.body.scrollHeight > h) {
		h = document.body.scrollHeight;
	}
	return h;
}


// BACKGROUND TRANSPARENT
function installBackground() {
	document.body.innerHTML += '<div id="background_zoom"></div>';
	h = getTotalHeightPage();
	c = document.getElementById('background_zoom');
	c.style.height = h+'px';
	c.style.display = 'block';
}
function desinstallBackground() {
	document.getElementById('background_zoom').style.display = 'none';
}