// popup functions
function open_popup (ref, url, width, height, scroll, resizable) {
  var win = window.open(url,
              ref,
              "menubar=no, " +
              "toolbar=no, " +
              "status=no, " +
              "location=no" + 
              ((width) ? (", width=" + width) : "") + 
              ((height) ? (", height=" + height) : "") +
              ((scroll) ? ", scrollbars=yes " : ", scrollbars=no") +
              ((resizable) ? ", resizable=yes " : ", resizable=no") 
             );
  win.focus()
}

function open_gallery (id, image, width, height) {
  var win = window.open("/about/gallery_image.html?" + image,
                        "gallery" + id,
                        "menubar=no, " +
                        "toolbar=no, " +
                        "status=no, " +
                        "location=no" + 
                        ((width) ? (", width=" + width) : "") + 
                        ((height) ? (", height=" + height) : "") +
                        ", scrollbars=no, resizable=no" 
                       );

  win.focus();
}


// get browser
var agent       = navigator.userAgent.toLowerCase(); 
var isIE        = (navigator.appName == "Microsoft Internet Explorer") ? true : false;
var isNetscape6 = (!document.all && !document.layers && navigator.appName == "Netscape" && parseInt(navigator.appVersion) >=5) ? true : false;
var isMac       = (agent.indexOf("Mac") != -1) ? true : false;
var isIE4       = (agent.indexOf("MSIE") != -1 && agent.indexOf("4.0;") != -1) ? true : false;
var isNetscape  = (agent.indexOf("Mozilla") != -1 && agent.indexOf("4.") != -1) ? true : false;
var win2000     = ((agent.indexOf("winnt") != -1) || (agent.indexOf("windows nt 5.0") != -1)) ? true : false; 
var winXP       = ((agent.indexOf("winnt") != -1) || (agent.indexOf("windows nt 5.1") != -1)) ? true : false; 
var isWin       = (agent.indexOf("windows") != -1) ? true : false;
var isMoz       = (agent.indexOf("gecko") != -1) ? true : false;