function show(targ) {
    if (document.getElementById) {

        if (document.getElementById(targ).style.display == "none") {
            document.getElementById(targ).style.display = "block";
        } else {
            document.getElementById(targ).style.display = "none";
        }

    } else if (document.all && !document.getElementById) {

        if (document.all[targ].style.display == "none") {
            document.all[targ].style.display = "block";
        } else {
            document.all[targ].style.display = "none";
        }
    }
} // JavaScript Document