extra column appears at last while hovering mouse : I have created a table with two columns in html using css. While hovering mouse outside the table an extra column appears at the right side. I don't want that extra unwanted column in my table. Please suggest what more changes do I need to make here. In the end, I need only 2 columns.

I have pasted the html code. Please help.

    <!DOCTYPE html>
    <html lang="en">
    	<head>
    	<meta name="gwt:property" content="locale=en_US">
    	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
         <style type="text/css">
    tr.even {
    	background-color: #FFFFFF;
    }
    tr.odd {
    	background-color: #EEEEEE;
    }
    .expand b{
        font-size:30px;
    }
    
    .xhide
    {
    }
    
    .expCode td:hover {background-color: #ddd;}
    .expCode th {
        padding-top: 12px;
        padding-bottom: 12px;
    	text-align: center;
    	font-size:16px;
        background-color: #276B8E; 
        color: #FFFFFF;
    }
    table{
    	border-color:grey;
    	display:table;
    	width:75%;	
    }
    
    </style>
    	</head>
    	<!-- comments only
    	-->
    	<body>
    
    <table class="expCode">
    
          <tbody>
        <tr>
             
              <td><table border="1" cellspacing="0"; style="width:75%">
                  <thead>
                  <tr>
                      <th style="width:25%">Column1</th>
                      <th style="width:50%">Column2</th>
                    </tr>
                </thead>
                  <tbody>
                  
                                         
                    <tr class="even">
                     <td>Text</td>
                      <td>
    				  <p>Text</p>
                      
                     
                    </tr>
                    <tr class="odd">
                      <td> Text</td>
                      <td><p>Text</p></td>
                  </tr>
              <tr class="even">
                      <td>Text</td>
                       <td><p>Text</p></td>
                    </tr>       
                    
                
                          
                              </tbody>
                              
      </tbody>
        </table>
    </body>
    
    </html>



