function openDiaporama(idStructure){
	var left = (screen.width-560)/2;
	var top = (screen.height-430)/2;
	var win = window.open("diaporama-grand.php5?idStructure="+idStructure, "Diaporama", "height=430, width=560, top="+top+", left="+left+", menubar=no,scrollbars=no,statusbar=no");
	
	if(!win) alert("Votre navigateur bloque les popups");
}