function popwin(file,width,height,resizable,scrollbars)
{
	W="";
	H="";
	SB="scrollbars=yes";
	RES="resizable=yes";
	if (resizable=='0') RES="resizable=no";
	if (scrollbars=='0') SB="scrollbars=no";
	if (resizable=='1') RES="resizable=yes";
	if (scrollbars=='1') SB="scrollbars=yes";	
	stringa="fullscreen=no,status=no,toolbar=no,menubar=no,location=no,directories=no,titlebar=0,location=no,"+RES+","+SB;
	if (width>0) W=",width="+width;
	if (height>0) H=",height="+height;
    window.open(file,'',"'"+stringa+H+W+"'");
}