// JavaScript manipulation des photos
var timer_photo;

function photo_div (id) {
	var div   = document.getElementById('calque_photo');
	// charge la taille de la fenetre
	if (document.all) {
		var large = document.body.offsetWidth;
		var haut  = document.body.offsetHeight ;}
	else {
		var large = document.width;
		var haut  = document.height;}
//	debugger;
	// lit les infos par ajax
	div.innerHTML = ajax_return (id,'photo');
	// calcule le positionnement
	div.style.left        = ((large-900)/2) + 'px';
	div.style.top         = '30px';
	div.style.width       = '900px';
	div.style.height      = '600px';		
	div.style.visibility  = "visible";

	initScrollBar();
	var photo = document.getElementById('photo');
	photo.style.marginTop = ((580-parseInt(photo.height))/2) + 'px';
	timer_photo = setInterval ('apparition_photo()', 20);
}

function photo_off () {
	
	var div   = document.getElementById('calque_photo');
	
	div.style.top         = '0px';
	div.style.left        = '0px';
	div.style.height      = "0px";
	div.style.width       = "0px";
	div.innerHTML         = '';
	div.style.opacity	  = '0.00';
	div.style.visibility  = "hidden";

}
function apparition_photo(){
	var div   = document.getElementById('calque_photo');
	div.style.opacity    = (parseFloat(div.style.opacity) + 0.1);
	if (div.style.opacity >= 1) {clearInterval (timer_photo);}
}