function openThickbox(cont_thickbox)
 {		
	document.getElementById("thickbox").style.visibility = "visible";
	
	// calcolo delle dimensioni della finestra del browser
	var width_win = document.documentElement.clientWidth;
	var height_win = document.documentElement.clientHeight;
		
	// dimensioni della thickbox
	var w_thickbox = 610 /*(width_win/100)*90;*/
	var h_thickbox = 440 /*height_win-50;*/

	var cont_thickbox = document.getElementById('cont_thickbox');

	cont_thickbox.style.width = w_thickbox + 'px'; /*w_thickbox-5 + 'px';*/
	cont_thickbox.style.height = h_thickbox-30 + 'px'; /*h_thickbox-100 + 'px';*/

	var link = "#TB_inline?height=" + h_thickbox + "&width=" + w_thickbox + "&inlineId=thickbox&modal=true";
	
	tb_show('Thickbox', link, null);
 }
 
 function closeThickbox()
 {
	document.getElementById("thickbox").style.visibility = "hidden";
	tb_remove();
 }