@calls[]
<center>
<form method="GET">
        <p>     
        Caller num: <input name="src" value="$form:src">
        Dialled num: <input name="dst" value="$form:dst">
        </p>    

        <p>     
        <input type="submit" value="Query">
        <input type="reset" value="Reset">
        </p>    
</form>

^if(def $form:src && def $form:dst){
        ^connect[$connect_string]{
                $sql_table[^table::sql{SELECT * FROM callstats WHERE src='$form:src' AND dst='$form:dst'}]}
        ^sql_table[]
        }{      
        pls define "Caller num" and "Dialled num" fields
}
</center>