Velocity Reviews - collapsing parts of a page.

Hi Aussie,

Regarding on the collapsing parts of the page question you mentioned, I
think there are two command approach to achive this functionality:

1. Use server-side code to show/hide the certain part of the page. You can
put some ASP.NET Panel or html <div> with "runat='server'" setting. Thus,
you can use some button or other postback event's code to show and hide
the certain Panel or Div.

2. If you do not want the page to postback everytime you change the certain
page fragment's visibility, you can use client script to do the work. The
css style "display" attribute can be used to show/hide a certain html
element. I have written a simple test page to demonstrate this, you can
have a look to see whether it performs as you want:

=======aspx template====================

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
<script type="text/javascript" >
function showhide(btn, divid)
{
var div = document.getElementById(divid);

if(btn.value == "-")
{
div.style.display = "none";
btn.value = "+";
}else
{
div.style.display = "";
btn.value = "-";
}
}

</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<table style="width:80%;border-width:2pt" >
<tr>
<td><input type="button" onclick="showhide(this,'div1');" value="-"
/>
<div id="div1" style="border-style:solid;border-width:1pt">
div1<br />
<asp:Button ID="Button1" runat="server" Text="Button" /><br />
<br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:Image ID="Image1" runat="server"
ImageUrl="http://www.bbc.co.uk/radio/i/images/bbc_ws_promo.gif" />

</div>
</td>
</tr>
<tr>
<td><input type="button" onclick="showhide(this,'div2');" value="-"
/>
<div id="div2" style="border-style:solid;border-width:1pt">
div2<br />
<asp:LinkButton ID="LinkButton1"
runat="server">LinkButton</asp:LinkButton><br />
<br />
<asp:Button ID="Button2" runat="server" Text="Button" />
<br />
<asp:HyperLink ID="HyperLink1"
runat="server">HyperLink</asp:HyperLink>
<asp:Image ID="Image2" runat="server"
ImageUrl="http://www.bbc.co.uk/radio/i/images/bbc_ws_promo.gif" />

</div>
</td>
</tr>

</table>
</div>
</form>
</body>
</html>
==================================

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead

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