Example
<script type="text/javascript">
function showme(id) {
var divid = document.getElementById(id);
if (divid.style.display == 'block') divid.style.display = 'none';
else divid.style.display = 'block';
}
</script>
<a onclick="showme('widget');" href="#">Show Widget</a>
<div id="widget" style="display:none;">
This is a widget
</div>
I want change text Show Widget & Hide Widget. Let me know