function popupopen(pagina,titolo,l,h,scroll,pos) {

	win_name = "mywindow";


	if(pos=="random"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-l)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
	if(pos=="center"){LeftPosition=(screen.width)?(screen.width-l)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;}
	if(pos=="right"){LeftPosition=screen.width-l-20;TopPosition=20;}
	else if((pos!="center" && pos!="random") || pos==null){LeftPosition=0;TopPosition=20}
	settings='width='+l+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
	eval(win_name+"=window.open(pagina ,titolo,settings)");
}