var selectedTab = 0;
        var pageSrc = new Array();

       function selectTab(tabIndex) {
            document.getElementById("tab" + selectedTab).className="unSelectedTab";
            document.getElementById("tabImage" + selectedTab).className = "unSelectedTabImage";
            document.getElementById("tab" + tabIndex).className = "selectedTab";
            document.getElementById("tabImage" + tabIndex).className = "selectedTabImage";
            selectedTab = tabIndex;
            var main = document.getElementById("main");
            main.src = pageSrc[tabIndex];
        }