function _openwindow(sPage, nWidth, nHeight,a,b) {
	var nLeft=(screen.width / 2) - (nWidth/2);
	var nTop = (screen.height / 2) - (nHeight/2);
	var n=new Date();
	sScrollbars = "no";
	if (a == 1) {
	  sScrollbars = "yes";
	}
	sResize = "no";
	if (b == 1) {
	  sResize = "yes";
	}
	window.open(sPage, 'detail'+n.getTime(), "toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars="+sScrollbars+", resizable="+sResize+", height="+nHeight+", width="+nWidth+", top="+nTop+", left="+nLeft+",");
   return;
}