/* jQuery Session vars v.0.3
 * by Jay Salvat
 * http://www.jaysalvat.com
 * -----------------------------------------------
 * Inspired by an idea from Mario Heiderich
 * http://code.google.com/p/quipt/
 * -----------------------------------------------
 * Requires jquery.json.js by DeadWisdom
 * http://code.google.com/p/jquery-json/
 * -----------------------------------------------
 * CHANGELOG
 * 0.3 -- 11-JUL-08
 * Security improvements
 * Calling manually sessionStart and sessionStop is not required anymore
 * Window.name is keept between pages
 * 0.2 -- 10-JUL-08
 * Now works with functions, objects and arrays
 * 0.1 -- 08-JUL-08
 * First draft
 * -----------------------------------------------
 * USAGE
 * - To Store
 * $(function() {
 * 	$.session("myVar, "value");
 * });
 * 
 * - To Read
 * $(function() {
 * 	alert( $.session("myVar) ); 	
 * });
*/
;(function($) { var sessionData = {}; var windowName = ""; var domain = location.href.match(/\w+:\/\/[^\/]+/)[0]; var referrer = (document.referrer) ? document.referrer.match(/\w+:\/\/[^\/]+/)[0] : ""; if(referrer == "" || referrer !== domain) { window.name = window.name.replace("#"+domain+"#", "");}
function loadData() { stored = window.name.split("#"+domain+"#"); windowName = window.name = stored[0]; if (data = stored[1]) { $.each(data.split(";"), function(i, data) { parts = data.split("="); varName = parts[0]; varValue = unescape(parts[1]); sessionData[varName] = varValue;});}
}
function saveData() { var dataToStore = windowName+"#"+domain+"#"; $.each(sessionData, function(varName, varValue) { if (varName && varValue) { dataToStore += ( varName + "=" + escape( varValue ) + ";" );}
}); window.name = dataToStore;}
$.session = function(name, value) { if (value) { if ($.isFunction(value)) { value = value();}
if ( $.toJSON ) { sessionData[name] = $.toJSON(value);} else { sessionData[name] = value;}
} else { if ( $.evalJSON ) { return $.evalJSON(sessionData[name]);} else { return sessionData[name];}
}
}
$.sessionStop = function() { saveData();}
$.sessionStart = function() { loadData();}
$.sessionStart(); window.onunload = function() { $.sessionStop();};})(jQuery);