var awardwindow = "";
function popup (param, w, h, mode)
					{
					if (awardwindow && awardwindow.closed!=true) awardwindow.close();
					mode = (mode)?mode:"";

					w = w?w:800;
					h = h?h:600;
					/*if ( isNaN(w) || isNaN(h) )
						dim = "";
					else 
						dim = ",width="+w+",height="+h;*/

					dim = ",width="+w+",height="+h;
				    breite = parseInt(screen.availWidth) - 10;
				    hoehe = parseInt(screen.availHeight) - 28;
				    px = (breite>w)? breite/2-w/2:0;
				    py = (hoehe>h)? hoehe/2-h/2:0;

				    if (mode=="blank")
				    	wProps = "";
					else
					    wProps = "top="+py+",left="+px+dim+",scrollbars=no,rezisable=no";

					awardwindow=window.open(param,"awardwindow",wProps);
					awardwindow.focus();
					}