function enBtn(oBtn) {
	oBtn.className = "btnEn";
	oBtn.disabled = false;
}
function disBtn(oBtn) {
	oBtn.className = "btnDis";
	oBtn.disabled = true;
}
function enSmBtn(oBtn) {
	oBtn.className = "btnSmEn";
	oBtn.disabled = false;
}
function disSmBtn(oBtn) {
	oBtn.className = "btnSmDis";
	oBtn.disabled = true;
}