function popup(url,name,win_height,win_width) {
	pos_horizon = ((screen.width/2)-(win_width/2));
	pos_vertical = ((screen.height/2)-(win_height/2));
	window.open(url,name,"width="+win_width+",height="+win_height+",resizable=yes,top="+pos_vertical+",left="+pos_horizon);
}

function popup_sb(url,name,win_height,win_width) {
	pos_horizon = ((screen.width/2)-(win_width/2));
	pos_vertical = ((screen.height/2)-(win_height/2));
	window.open(url,name,"width="+win_width+",height="+win_height+",resizable=yes,top="+pos_vertical+",left="+pos_horizon+",scrollbars");
}