function openhelp (URL , window_name , width , height) {
        // URL is URL to open in new window
        // window_name is name of new window - default is helpWin
        // width is width of new window, default is 465
        // height is height of new window, default is 310
        if (window_name == null) window_name = 'helpWin';
        if (width == null) width = '465';
        if (height == null) height = '310';
        
        // Open the window
        var newWindow = window.open(URL , window_name , 'width='+width+',height='+height+',scrollbars,resizable');
        
        
        newWindow.focus();        // Bring window to front
     }