// JavaScript Document
function popup(speaker){
	var width=300;
	var height=250;
	var left = (screen.width/2) - width/2;
	var top = (screen.height/2) - height/2;

	openpopup=window.open('watch.php?speaker='+speaker ,'','width='+width+',height='+height+',left='+left+',top='+top+',resizable=no,scrollbars=no,status=yes');
	openpopup.opener.name='main_window';
}