kakikubo/gist:5fb085cfd3dcc2c67b7e

## gistfile1.txt
<html>
    <head>
        <script src="./knockout.js"></script>
    </head>
    <body>
        <p>
        <input type="checkbox" data-bind="checked: hasCellphone" />
        携帯電話をもっている
        </p>
        <p>
            電話番号:
            <input type='text' data-bind="value: cellphoneNumber, enable: hasCellphone"/>
        </p>
        <script type="text/javascript">
            var viewModel = {
                hasCellphone : ko.observable(false),
                cellphoneNumber : ""
            };
            ko.applyBindings(viewModel);
        </script>
    </body>
</html>
	<html>
	<head>
	<script src="./knockout.js"></script>
	</head>
	<body>
	<p>
	<input type="checkbox" data-bind="checked: hasCellphone" />
	携帯電話をもっている
	</p>
	<p>
	電話番号:
	<input type='text' data-bind="value: cellphoneNumber, enable: hasCellphone"/>
	</p>
	<script type="text/javascript">
	var viewModel = {
	hasCellphone : ko.observable(false),
	cellphoneNumber : ""
	};
	ko.applyBindings(viewModel);
	</script>
	</body>
	</html>