JavaScript for Expand and Collapse(using table)

Here you can find the code base for minimizing and maximization of some part of content placed in a table based in java script.

<script language="javascript" type="text/javascript">
        function hideTable() {
            var obj = document.getElementById('hiddenText');
            if (obj.value == 'expand') {
                obj.value = 'collapse';
                document.getElementById('tbltable').style.visibility = "hidden";
            }
            else if (obj.value == 'collapse') {
                obj.value = 'expand';
                document.getElementById('tbltable').style.visibility = "visible";
            }
            return false;
        }
    </script>