function Uncover(elem) {
    document.getElementById(elem).style.display = 'none';
}
function Coverup(elem) {
    document.getElementById(elem).style.display = 'block';
}

function WatermarkFocus(txtElem, strWatermark) {
    if (txtElem.value == strWatermark) {
        txtElem.style.color = "#000000";
        txtElem.value = '';
    }
}

function WatermarkBlur(txtElem, strWatermark) {
    if (txtElem.value == '') {
        txtElem.style.color = "#666666";
        txtElem.value = strWatermark;
    }
}