// JavaScript Document
function changetab(obj){
	if(obj == 'cachtinh_sg'){
		document.getElementById("id_ct_sg").style.display = "block";
		document.getElementById("cachtinh_sg").className = 'active_bg';
		document.getElementById("ac_cachtinh_sg").style.display = 'block';
		document.getElementById("id_def").style.display = "none";
	}
	else
	{
		document.getElementById("id_ct_sg").style.display = "none";
		document.getElementById("cachtinh_sg").className = '';
		document.getElementById("ac_cachtinh_sg").style.display = 'none';
	}
	if(obj == 'cachtinh_tinh'){
		document.getElementById("id_ct_tinh").style.display = "block";
		document.getElementById("cachtinh_tinh").className = 'active_bg';
		document.getElementById("ac_cachtinh_tinh").style.display = 'block';
		document.getElementById("id_def").style.display = "none";
	}
	else
	{
		document.getElementById("id_ct_tinh").style.display = "none";
		document.getElementById("cachtinh_tinh").className = '';
		document.getElementById("ac_cachtinh_tinh").style.display = 'none';
	}
	if(obj == 'info_batbuoc'){
		document.getElementById("id_ct_bb").style.display = "block";
		document.getElementById("info_batbuoc").className = 'active_bg';
		document.getElementById("ac_info_batbuoc").style.display = 'block';
		document.getElementById("id_def").style.display = "none";
	}
	else
	{
		document.getElementById("id_ct_bb").style.display = "none";
		document.getElementById("info_batbuoc").className = '';
		document.getElementById("ac_info_batbuoc").style.display = 'none';
	}
}