function tab(a,b,c,d){
	document.getElementById(a).style.display = "inline-block";
	document.getElementById(b).style.display = "none";
	document.getElementById(c).style.display = "none";
	document.getElementById(d).style.display = "none";
}

function tabbg(a,b,c,d){
	document.getElementById(a).style.backgroundColor = "#FFF";
	document.getElementById(b).style.backgroundColor = "#CCC";
	document.getElementById(c).style.backgroundColor = "#CCC";
	document.getElementById(d).style.backgroundColor = "#CCC";
}

function filter(div_id){
	var verify = document.getElementById(div_id);
	if (verify.style.display == "none"){
		verify.style.display = "block";
	}else{
		verify.style.display = "none";
	}
}