function performSearch(field) {
    var searchBox = document.getElementById(field);
    if (searchBox != null) {
        if (searchBox.value.length != 0 && searchBox.value != "Enter Keywords...") {
            window.location = "Search.aspx?t=" + searchBox.value;
        }
        else {
            alert("Please enter some search keywords before submitting.");
        }
    }
}

function keydownSearchField(field) {
    try {
        if ((event.which && event.which == 13) || (event.keyCode && event.keyCode == 13)) {
            performSearch(field);
            return false;
        }
        else {
            return true;
        }
    }
    catch (e) {
        return true;
    }
}

function clearText(field) {
    if (field.value == "Enter Keywords...")
        field.value = '';
    else if (field.value == '')
        field.value = "Enter Keywords...";

}