Want to return global variable

[aos]

when the radio button is clicked, I want to make the textbox visible. initially the textbox is invisible. i'm using global variable to pass the visibility value.
Any ideas where i'm going wrong? Thanks!

global variable
<%!String vis;%>
<%vis = &quot;visibility:hidden&quot;;%>

Radio button calls Visible function
<p><INPUT ONCLICK=&quot;Visible()&quot; type=&quot;radio&quot; value=&quot;<%=vDPID%>&quot; name=&quot;R1&quot;></p>


<input type=&quot;text&quot; name=&quot;f1&quot; id = &quot;f1&quot; readonly=&quot;true&quot; value =&quot;<%=vActualServers%>&quot; size = &quot;11&quot; style=&quot;<%=vis%>&quot; ></td>
<%System.out.println(&quot;new value for vis&quot; + vis);%>

<td class=&quot;tdborder&quot; width=&quot;91&quot;>
<input type=&quot;text&quot; name=&quot;f2&quot; readonly=&quot;true&quot; value =&quot;<%=vActualCompletion%>&quot; size=&quot;9&quot;style=&quot;<%=vis%>&quot;></td>


</tr>
</form>
<%
}
%>

<SCRIPT LANGUAGE=&quot;JavaScript&quot;>
function Visible()
{


alert(&quot;in Visible&quot;
var m_out = &quot;<%=vis%>&quot;;
alert(&quot;m_out is&quot; +m_out);
if(m_out==&quot;visibility:hidden&quot
{
alert(&quot;in check&quot;
<%vis=&quot;visibility:visible&quot;;%>
var m_out = &quot;<%=vis%>&quot;;

return &quot;<%=vis%>&quot;;

}


}

</SCRIPT>