var XFORM3 = {
	sel: null,

	init:function() {
		var e = document.getElementById('xFormFieldD31');
		if (!e) return;
		this.sel = e;
		e.onchange = function() { XFORM3.updateVisibility(); }

		XFORM3.updateVisibility();
	},


	updateVisibility: function() {
		var e;
		for (var i=0;i<this.sel.options.length;i++) {
			if (e = document.getElementById(this.sel.options[i].value)) e.style.display = 'none';
		}

		e = document.getElementById(this.sel.options[this.sel.selectedIndex].value);
		if (e) {
			e.style.display = 'block';
		}
	}

	
}