function create_captcha(){
	Recaptcha.create( 
		"6Ld4-gkAAAAAANV2Sx3wqGxAfvLpnY_WNyb9ct2c", // public key
		"recaptcha_div", {
			theme: "white",
			callback: Recaptcha.focus_response_field
		});
}

function destroy_captcha(){
	Recaptcha.destroy();
}