// run on every page
var sHistory = getCookie("syronHistory").split(",");

sHistory.push(location.href);
if (sHistory.length > 10){
	sHistory.shift();
}


setCookie("syronHistory", sHistory.join(",")); 


function goBack(){
//	window.back();
	var curPage = location.href;
	var sHistory = getCookie("syronHistory").split(",");
	
	var historyIndex = sHistory.length-1;

	// If no history
	if (historyIndex < 1){ window.back();}
	
	while (sHistory[historyIndex] == curPage || sHistory[historyIndex].substr(-5) == "pid=0"){
		historyIndex--;
	}
	
	// DEBUG
	var historyIndex2 = sHistory.length;
	var sHistoryList = "";
	while (historyIndex2--){	sHistoryList += historyIndex2+"- "+sHistory[historyIndex2]+"\n";}
//	alert("goBack:\n historyIndex: " + historyIndex  +"\nsHistoryList: " + sHistoryList  );
	// END DEBUG
	
	window.location = sHistory[historyIndex];
}
function goBackToDesignGuide(){
//	window.back();
	var curPage = location.href;
	var sHistory = getCookie("syronHistory").split(",");
	
	var historyIndex = sHistory.length-1;

	// If no history
	if (historyIndex < 1){ window.back();}
	
	while (sHistory[historyIndex].search(/(pid\=5)/) < 0){
		 historyIndex--;
			 if (historyIndex < 0) break;
	}
	
	// DEBUG
	//alert("goBackToDesignGuide [" + historyIndex  +"]: " + sHistory[historyIndex]  );
	
	window.location = sHistory[historyIndex];
}
function goBackToProduct(){
	var curPage = location.href;
	var sHistory = getCookie("syronHistory").split(",");
	
	var historyIndex = sHistory.length-1;

	// If no history
	if (historyIndex < 1){ window.back(); return(false);}

	while (sHistory[historyIndex] == curPage || sHistory[historyIndex].slice(-5) != "pid=0"){
		historyIndex--;
		if (historyIndex <= 0) break;
	}

	// DEBUG
//	var historyIndex2 = sHistory.length;
//	var sHistoryList = "";
//	while (historyIndex2--){	sHistoryList += historyIndex2+"- "+sHistory[historyIndex2]+"\n";}
//	alert("goBack:\n historyIndex: " + historyIndex  +"\nsHistoryList: " + sHistoryList  );
	// END DEBUG
	
	window.location = sHistory[historyIndex];
}


/**
 * Sets a Cookie with the given name and value.
 *
 * name       Name of the cookie
 * value      Value of the cookie
 * [expires]  Expiration date of the cookie (default: end of current session)
 * [path]     Path where the cookie is valid (default: path of calling document)
 * [domain]   Domain where the cookie is valid
 *              (default: domain of calling document)
 * [secure]   Boolean value indicating if the cookie transmission requires a
 *              secure transmission
 */
function setCookie(name, value, expires, path, domain, secure) {
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

/**
 * Gets the value of the specified cookie.
 *
 * name  Name of the desired cookie.
 *
 * Returns a string containing value of specified cookie,
 *   or null if cookie does not exist.
 */
function getCookie(name) {
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
        begin = dc.indexOf(prefix);
        if (begin != 0) return "";
    } else {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1) {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}