function FF(Id) {
		return document.getElementById(Id);
	};

	function chkF() {
		if (FF('iagree').checked) {
			FF('signup').disabled = false;
			FF('signup').className = 'submit enabled';
			
		} else if (!FF('iagree').checked) {

			FF('signup').disabled = true;
			FF('signup').className = 'submit disabled';
		};
		
	};