HTML colspan和rowspan问题

Question

I have an issue with HTML colspan & rowspan , I want to merge the first column (name) and last column (telephone) but it gave me unwanted result. Here's what I want as result:

Here what I got:

My code:

 <table> <tr> <th colspan="3">Name</th> <th rowspan="2">Age</th> <th colspan="2">Telephone</th> </tr> <tr> <th>First name</th> <th>Middle name</th> <th>Last name</th> </tr> <tr> <th>pre</th> <th>post</th> </tr> <tr> <td>Jill</td> <td>David</td> <td>Smith</td> <td>50</td> <td>055</td> <td>5778541</td> </tr> <tr> <td>Roben</td> <td>Jill</td> <td>Adam</td> <td>35</td> <td>050</td> <td>5577854</td> </tr> </table> 

Answer 1

change rowspan to colspan and fix the colspan's value

 <table border=1> <tr> <th colspan="3">Name</th> <th colspan="1">Age</th> <th colspan="2">Telephone</th> </tr> <tr> <th>First name</th> <th>Middle name</th> <th>Last name</th> <th></th> <th>pre</th> <th>post</th> </tr> <tr> <td>Jill</td> <td>David</td> <td>Smith</td> <td>50</td> <td>055</td> <td>5778541</td> </tr> <tr> <td>Roben</td> <td>Jill</td> <td>Adam</td> <td>35</td> <td>050</td> <td>5577854</td> </tr> </table> 

Answer 2

From the second row you have to fill all coloms.

 <table> <tr> <th colspan="3">Name</th> <th rowspan="1">Age</th> <th colspan="2">Telephone</th> </tr> <tr> <th>First name</th> <th>Middle name</th> <th>Last name</th> <th></th> <th>pre</th> <th>post</th> </tr> <tr> <td>Jill</td> <td>David</td> <td>Smith</td> <td>50</td> <td>055</td> <td>5778541</td> </tr> <tr> <td>Roben</td> <td>Jill</td> <td>Adam</td> <td>35</td> <td>050</td> <td>5577854</td> </tr> </table> 

Answer 3

Just Add 4 empty Heading Tag Before Pre&post like this code:

<table>
            <tr> 
                <th colspan="3">Name</th>
                <th rowspan="2">Age</th>
                <th colspan="2">Telephone</th>
            </tr>
            <tr>
                <th>First name</th>
                <th>Middle name</th>
                <th>Last name</th>
            </tr>
            <tr>
                <th></th>
                <th></th>
                <th></th>
                <th></th>
                <th>pre</th>
                <th>post</th>
            </tr>
            <tr> 
                <td>Jill</td>
                <td>David</td>
                <td>Smith</td> 
                <td>50</td>
                <td>055</td>
                <td>5778541</td>  
            </tr> 
            <tr> 
                <td>Roben</td>
                <td>Jill</td> 
                <td>Adam</td> 
                <td>35</td>
                <td>050</td>
                <td>5577854</td>
            </tr>
        </table>