function popup(popurl, width, height, target, resize, scroll){
	width = Math.min(width,screen.availWidth);
	height = Math.min(height,screen.availHeight);
	var popup_win = window.open(popurl,target,"status=no,top="+((screen.availHeight-height)/2)+",left="+((screen.availWidth-width)/2)+",scrollbars=" +(scroll? 'yes' : 'no')+ ",resizable=" +(resize? 'yes' : 'no')+ ",width="+width+",height="+height);
	popup_win.focus();
}