function change_big_pic (big_img_name, pic_url) {
			temp = new Image();
			temp.src = pic_url;
			document.getElementById (big_img_name).src = temp.src;
		}

		function highlight (a_num) {
			for (i=1; true; i++) {
				if (document.getElementById ('pr_'+i)) {
					document.getElementById ('pr_'+i).className = '';
				}
				else {
					break;
				}
			}
			if (document.getElementById ('pr_'+a_num)) {
				document.getElementById ('pr_'+a_num).className = 'active';
			}
		}
		
		function show_texttab (a_num) {
			for (i=1; true; i++) {
				if (document.getElementById ('tx_'+i)) {
					document.getElementById ('tx_'+i).style.display = 'none';
				}
				else {
					break;
				}
			}
			if (document.getElementById ('tx_'+a_num)) {
					document.getElementById ('tx_'+a_num).style.display = 'block';
			}
		}

function setVisible(identif, n) { for( i = 1; i <= 3;  i++) { 
		document.getElementById(identif + i).style.display = "none"
	}
	document.getElementById(identif + n).style.display = ""
}


function confirmSubmit(username) {
var agree=confirm("Удалить "+username+" из записаных на семинар?");
if (agree)
return true ;
else
return false ;
}