var THUMBS_PER_VIEW = 10;
var THUMB_CLASS = "thumb";
var BLANK_IMG = "img/blank.jpg";
var LOADER_IMG = "img/loader.gif";
var IMG_ID_PREFIX = "thumbcont_id_";
var CHANGE_PAUSE = 400;
var MAX_PRELOAD_TIME = 3000;

var ABOUT_LINK_BOTTOM_MARGIN = 15;

/** Browser version. */
var agent = navigator.userAgent.toLowerCase();
/** IE (either 6 or 7). */
var IE = (agent.indexOf("msie") != -1 && agent.indexOf("opera") == -1);
/** IE7. */
var IE7 = (agent.indexOf("msie 7") != -1);
/** Opera. */
var OPERA = (agent.indexOf("opera") != -1);
/** Safari. */
var SAFARI = (agent.indexOf("safari") != -1);
/** Firefox, any version. */
var FIREFOX = (agent.indexOf("gecko") != -1);