window.onload = initialize;
function initialize() {
// initialize the DHTML History
// framework
dhtmlHistory.initialize();
// subscribe to DHTML history change
// events
dhtmlHistory.addListener(historyChange);
// if this is the first time we have
// loaded the page...
if (dhtmlHistory.isFirstLoad()) {
debug("Adding values to browser "
+ "history", false);
// start adding history
dhtmlHistory.add("helloworld",
"Hello World Data");
dhtmlHistory.add("foobar", 33);
dhtmlHistory.add("boobah", true);
var complexObject = new Object();
complexObject.value1 =
"This is the first value";
complexObject.value2 =
"This is the second data";
complexObject.value3 = new Array();
complexObject.value3[0] = "array 1";
complexObject.value3[1] = "array 2";
dhtmlHistory.add("complexObject",
complexObject);
// cache some values in the history
// storage
debug("Storing key 'fakeXML' into "
+ "history storage", false);
var fakeXML =
'<?xml version="1.0" '
+ 'encoding="ISO-8859-1"?>'
+ '<foobar>'
+ '<foo-entry/>'
+ '</foobar>';
historyStorage.put("fakeXML", fakeXML);
}然后，如果用户离开页面后又通过后退按钮返回该页面，我们可以使用get()方法提取保存的值，或者使用hasKey()方法检查该值是否存在。
window.onload = initialize;
function initialize() {
// initialize the DHTML History
// framework
dhtmlHistory.initialize();
// subscribe to DHTML history change
// events
dhtmlHistory.addListener(historyChange);
// if this is the first time we have
// loaded the page...
if (dhtmlHistory.isFirstLoad()) {
debug("Adding values to browser "
+ "history", false);
// start adding history
dhtmlHistory.add("helloworld",
"Hello World Data");
dhtmlHistory.add("foobar", 33);
dhtmlHistory.add("boobah", true);
var complexObject = new Object();
complexObject.value1 =
"This is the first value";
complexObject.value2 =
"This is the second data";
complexObject.value3 = new Array();
complexObject.value3[0] = "array 1";
complexObject.value3[1] = "array 2";
dhtmlHistory.add("complexObject",
complexObject);
// cache some values in the history
// storage
debug("Storing key 'fakeXML' into "
+ "history storage", false);
var fakeXML =
'<?xml version="1.0" '
+ 'encoding="ISO-8859-1"?>'
+ '<foobar>'
+ '<foo-entry/>'
+ '</foobar>';
historyStorage.put("fakeXML", fakeXML);
}
// retrieve our values from the history
// storage
var savedXML =
historyStorage.get("fakeXML");
savedXML = prettyPrintXml(savedXML);
var hasKey =
historyStorage.hasKey("fakeXML");
var message =
"historyStorage.hasKey('fakeXML')="
+ hasKey + "<br>"
+ "historyStorage.get('fakeXML')=<br>"
+ savedXML;
debug(message, false);
}prettyPrintXml()是一个定义在完整示例源代码中的实用方法；此函数准备在web页面中显示以便用于调试的简单XML。
更多内容请看PCdog.com--Ajax技术 AJAX应用实践专题
