function OpenWindow(filename,windowname,sWidth,sHeight) 
	{
		width=sWidth
		height=sHeight
		  x = (640 - width)/2;
		  y = (480 - height)/2;
		
		    if (screen) 
		    {
		        y = (screen.availHeight - height)/2;
		        x = (screen.availWidth - width)/2;
		    }
	    mywindow = window.open(filename,windowname,'toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=' + sWidth + ',height=' + sHeight + ',screenX=' + x + ',left=' + x + ',screenY=' + y + ',top=' + y);
	    mywindow.focus()
	}

	function OpenWindowWB(filename,windowname,sWidth,sHeight) 
	{
	    mywindow = window.open(filename,windowname,'toolbar=yes,location=no,directories=no,status=no,menubar=yes,scrollbars=yes,resizable=yes,copyhistory=no,width=' + sWidth + ',height=' + sHeight + '');
	    mywindow.focus()
	}