function showDiv(showName) {
    document.getElementById("ctl00_ctl00_ContentPlaceHolder1_ContentPlaceHolder1_div2").style.display = "none";
    document.getElementById("ctl00_ctl00_ContentPlaceHolder1_ContentPlaceHolder1_div1").style.display = "none";

    if (showName == "div1") {
        document.getElementById("ctl00_ctl00_ContentPlaceHolder1_ContentPlaceHolder1_div2").style.display = "block";
    } else {
    document.getElementById("ctl00_ctl00_ContentPlaceHolder1_ContentPlaceHolder1_div1").style.display = "block";
    }
}