function ChangeCostAttr() {

	var obj = "", frm;

	frm = document.pay;

	if ( frm.cost.value == "false" ) {
		obj = document.getElementById("no1");
		obj.style.display = ( obj.style.display != "none" ) ? "none" : "";
		obj = document.getElementById("no2");
		obj.style.display = ( obj.style.display != "none" ) ? "none" : "";
		return 1;
	} else {
		obj = document.getElementById("no1");
		obj.style.display = "none";
		obj = document.getElementById("no2");
		obj.style.display = "none";
	}

}