function checkFormEle(thisEle, thisText, thisClass) {
    if (thisEle.value == thisText) thisEle.value = '';
    if (thisClass) thisEle.className = thisClass;
}

function resetFormEle(thisEle, thisText, thisClass) {
    if (thisEle.value == '') thisEle.value = thisText;
    if (thisClass) thisEle.className = thisClass;
}