title: A page can only have one server tag
body: <p>i have a master page with me but when i run the shopcart page, it shows me the error "A page can have only one server-side Form tag". i dont know which runat to be removed
  Any help would be appreciated thanks :)</p>
  
  <p>this are my codes for master page</p>
  
  <pre><code>&lt;asp:ContentPlaceHolder ID="headersContainer" runat="server" /&gt;   
  
  &lt;div id="container"&gt;
  &lt;div id="header"&gt;
  
      &lt;div class="clear"&gt;&lt;/div&gt;
  &lt;/div&gt;
  &lt;div id="nav"&gt;
      &lt;ul&gt;
          &lt;li &gt;&lt;a href="index.html"&gt;Home&lt;/a&gt;&lt;/li&gt;
          &lt;li&gt;&lt;a href="examples.html"&gt;Orders&lt;/a&gt;&lt;/li&gt;
          &lt;li&gt;&lt;a href="#"&gt;Cart&lt;/a&gt;&lt;/li&gt;
          &lt;li&gt;&lt;a href="#"&gt;Shipment&lt;/a&gt;&lt;/li&gt;
  
      &lt;/ul&gt;
  &lt;/div&gt;
  &lt;div id="body"&gt;
      &lt;div id="content"&gt;
      &lt;div style= "text-align:right";&gt;
      &lt;form runat="server"&gt;
          &lt;asp:Button ID="Button1"  runat="server" Text="Items in Shopping Cart" BackColor="#FF531A" 
              BorderStyle="Dotted" CausesValidation="False" ForeColor="White" 
              Font-Bold /&gt;&lt;/form&gt;&lt;/div&gt;
  
          &lt;asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server"  &gt;
  
      &lt;/asp:ContentPlaceHolder&gt;
  
  
      &lt;/div&gt;
      &amp;nbsp&amp;nbsp&amp;nbsp&amp;nbsp&amp;nbsp&amp;nbsp&amp;nbsp
      &lt;div class="sidebar"&gt;
          &lt;ul&gt;    
             &lt;li&gt;
                  &lt;h3&gt;User&lt;/h3&gt;
                  &lt;ul class="blocklist"&gt;
                      &lt;li&gt;&lt;a href="index.html"&gt;Register&lt;/a&gt;&lt;/li&gt;
                      &lt;li&gt;&lt;a href="examples.html"&gt;Login&lt;/a&gt;&lt;/li
                  &lt;/ul&gt;
              &lt;/li&gt;
              &amp;nbsp
             &lt;li&gt;
                  &lt;h3&gt;Categories&lt;/h3&gt;
                  &lt;ul&gt;
                      &lt;li&gt;&lt;a href="http://www.themeforest.net/?ref=spykawg" &gt;&lt;strong&gt;Gadgets&lt;/strong&gt;&lt;/a&gt;&lt;/li&gt;
                      &lt;li&gt;&lt;a href="http://www.dreamhost.com/r.cgi?259541" &gt;&lt;strong&gt;Accessories&lt;/strong&gt;&lt;/a&gt; &lt;/strong&gt;&lt;/li&gt;
  
                  &lt;/ul&gt;
              &lt;/li&gt;
              &amp;nbsp
              &lt;li&gt;
                  &lt;h3&gt;Search&lt;/h3&gt;
                  &lt;ul&gt;
                      &lt;li&gt;
                          &lt;form method="get" class="searchform" action="http://wpdemo.justfreetemplates.com/" &gt;
                              &lt;p&gt;
                                  &lt;input type="text" size="12" value="" name="s" class="s" /&gt;
                                  &lt;input type="submit" class="searchsubmit formbutton" value="Search" /&gt;
                              &lt;/p&gt;
                          &lt;/form&gt; 
                      &lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/li&gt;
  
  
  
          &lt;/ul&gt; 
      &lt;/div&gt;
  </code></pre>
  
  <p>this are codes for my shopCart page</p>
  
  <pre><code>&lt;asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"&gt;
  &lt;form id= "form1" runat="server"&gt;
      &lt;asp:DropDownList ID="ddlCategory" runat="server" AutoPostBack="True" &gt;
      &lt;/asp:DropDownList&gt;
      &lt;br /&gt;
      &lt;br /&gt;
      &lt;asp:GridView ID="grdCatalogue" runat="server" AutoGenerateColumns="False" 
          Width ="100px" onselectedindexchanged="grdCatalogue_SelectedIndexChanged"&gt;
          &lt;Columns&gt;
              &lt;asp:BoundField DataField="ProductID" HeaderText="ProductID" &gt;
              &lt;ControlStyle Width="80px" /&gt;
              &lt;FooterStyle Width="80px" /&gt;
              &lt;HeaderStyle Width="80px" /&gt;
              &lt;ItemStyle Width="80px" /&gt;
              &lt;/asp:BoundField&gt;
              &lt;asp:BoundField DataField="ProductName" HeaderText="ProductName" /&gt;
              &lt;asp:BoundField DataField="Price" HeaderText="Price" /&gt;
              &lt;asp:BoundField DataField="Quantity" HeaderText="Quantity" /&gt;
              &lt;asp:BoundField DataField="UserName" HeaderText="Sold By" /&gt;
              &lt;asp:BoundField DataField="Date" HeaderText="Date Uploaded" /&gt;
              &lt;asp:ImageField DataImageUrlField="Image1FileName" 
                  DataImageUrlFormatString="~/Image/{0}" HeaderText="Image"&gt;
              &lt;/asp:ImageField&gt;
              &lt;asp:CommandField ButtonType="Button" HeaderText="Add to Cart" 
                  ShowSelectButton="True" /&gt;
          &lt;/Columns&gt;
      &lt;/asp:GridView&gt;
  
      &lt;asp:Label ID="lblResult" runat="server" Text="Label"&gt;&lt;/asp:Label&gt;
  </code></pre>
  
  <p>
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