function clearAll() {
    document.getElementById('Delhi').style.display = "none";
    document.getElementById('NCR').style.display = "none";
    document.getElementById('India').style.display = "none";
    document.getElementById('World').style.display = "none";

    document.getElementById('Delhitab').className = "panelOneItem";
    document.getElementById('NCRtab').className = "panelTwoItem";
    document.getElementById('Indiatab').className = "panelThreeItem";
    document.getElementById('Worldtab').className = "panelFourItem";

    document.getElementById('DelhiLink').className = "WhiteLink";
    document.getElementById('NCRLink').className = "WhiteLink";
    document.getElementById('IndiaLink').className = "WhiteLink";
    document.getElementById('WorldLink').className = "WhiteLink";
}

var section = "";

function switchOut(section) {
    clearAll();
    document.getElementById(section).style.display = "block";
    document.getElementById(section + "tab").className = "panelCItem";
    document.getElementById(section + "Link").className = "Selected";
}