//=====================display On Off begin=====================
function displayOnOff(tbName_){
	    document.getElementById("MenuGioiThieu").style.display="none";
	    document.getElementById("MenuDichVu").style.display="none";
	    document.getElementById("MenuSanPham").style.display="none";
	    document.getElementById("MenuBaoGia").style.display="none";
	    document.getElementById(tbName_).style.display="block";
}
function displayOnOff_(){
	    document.getElementById("MenuGioiThieu").style.display="none";
	    document.getElementById("MenuDichVu").style.display="none";
	    document.getElementById("MenuBan").style.display="none";
	    document.getElementById("MenuBaoGia").style.display="none";
}
//=====================display On Off end=======================