window.onload = resetTab;
            function getTabTitle(tab) {
                var childNodesList = tab.childNodes;
                var titleNodes = new Array();
                var j = 0;
                var i;
                for (i = 0; i < childNodesList.length; i++) {
                    if (childNodesList[i].nodeName == "H4") {
                        titleNodes[j] = childNodesList[i];
                        j++;
                    }
                }
                return titleNodes;
            }
            function getTabContent(tab) {
                var childNodesList = tab.childNodes;
                var tabContent = new Array();
                var j = 0;
                var i;
                for (i = 0; i < childNodesList.length; i++) {
                    if (childNodesList[i].nodeName == "DIV") {
                        tabContent[j] = childNodesList[i];
                        j++;
                    }
                }
                return tabContent;
            }
            function resetTab() {
                var allDiv = document.getElementsByTagName("div");
                var tab = new Array();
                var j = 0;
                var i;
                for (i = 0; i < allDiv.length; i++) {
                    if (allDiv[i].className == "tabs") {
                        tab[j] = allDiv[i];
                        j++;
                    }
                }
                var tabTitle, tabContent;
                for (i = 0; i < tab.length; i++) {
                    tabTitle = getTabTitle(tab[i]);
                    tabTitle[0].className = "selectTab";
                    tabContent = getTabContent(tab[i]);
                    tabContent[0].className = "selectContent";
                    for (j = 1; j < tabTitle.length; j++) {
                        tabTitle[j].className = "unselectTab";
                        tabContent[j].className = "unselectContent";
                    }
                }
            }
            function changTab(tab) {
                var tabTitle, tabContent, i;
                if (tab.className != "selectTab") {
                    tabTitle = getTabTitle(tab.parentNode);
                    tabContent = getTabContent(tab.parentNode);
                    for (i = 0; i < tabTitle.length; i++) {
                        if (tabTitle[i].className == "selectTab") {
                            tabTitle[i].className = "unselectTab";
                        }
                        if (tabContent[i].className == "selectContent") {
                            tabContent[i].className = "unselectContent";
                        }
                    }
                    tab.className = "selectTab";
                    for (i = 0; i < tabTitle.length; i++) {
                        if (tabTitle[i].className == "selectTab") {
                            tabContent[i].className = "selectContent";
                            break;
                        }
                    }
                }
            }