i want to get table-tr-td values without any id,class. 

Since I have no idea about the structure of your table, i have written following as a sample. Modify it as you wish

HTML

<table>
    <tr>
        <td>R1_C1</td>
        <td>R1_C2</td>
    </tr>
    <tr>
        <td>R2_C1</td>
        <td>R2_C2</td>
    </tr>
</table>

Javascript

$("table").each(function(){
    $("tr", $(this)).each(function(){
        $("td", $(this)).each(function(){
            console.log($(this).html());
        });
    });
});
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