Testing Cell Width

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
   <div class="table-responsive bis">
       
       <table class=" table  table-striped" id="header">
       </table>
        
<table class=" table  table-striped" id="datatable_pagament_invisibile">
        <thead class="">
            <tr id="">  
                <th class=" ">Categoria</th> 
                <th class=" ">Descrizione</th>
                <th class=" ">Codice</th>  
                <th class=" ">Stampa dati bancari</th> 
                <th class=" ">Stampa dati cliente</th>
                <th class=" ">I.V.A. prima rata</th> 
                <th class=" ">D.F.F.M</th> 
                <th class=" "> Numero di rate</th>
                <th class=" "> Giorni aggiuntivi</th>
                <th class=" "> 1° rata</th>
                <th class=" "> 2° rata</th>
                <th class=" "> 3° rata</th>
                <th class=""> Visibile</th>
                <th class=""> Periodo</th>
            </tr>
        </thead>
        <tbody>
        <tr><td value="1-1">3</td><td value="1-2">R.D. 90 giorni D.F.F.M.</td><td value="1-3">00001</td><td value="1-4">1</td><td value="1-5">0</td><td value="1-6">0</td><td value="1-7">1</td><td value="1-8">1</td><td value="1-9">0</td><td value="1-10">90</td><td value="1-11">0</td><td value="1-12">0</td><td value="1-13">1</td><td value="1-14">0</td></tr><tr><td value="2-1">2</td><td value="2-2">Ri.Ba. 30/60/90 giorni D.F.F.M.</td><td value="2-3">00002</td><td value="2-4">0</td><td value="2-5">1</td><td value="2-6">0</td><td value="2-7">1</td><td value="2-8">3</td><td value="2-9">0</td><td value="2-10">30</td><td value="2-11">60</td><td value="2-12">90</td><td value="2-13">1</td><td value="2-14">0</td></tr><tr><td value="3-1">2</td><td value="3-2">Ri.Ba. 90 giorni + 5</td><td value="3-3">00003</td><td value="3-4">0</td><td value="3-5">1</td><td value="3-6">0</td><td value="3-7">0</td><td value="3-8">1</td><td...

CSS

.table-responsive {
    overflow-y:scroll; 
    height:300px; 
    display:block;  
    
    
}
#header {
    position: relative;
    top: 0;
  
}
#header th {
    
    display:inline-block;
    float: left;
    vertical-align:bottom;
  

}

JavaScript

resizeCol(14);


function resizeCol(numerocolonne){
    $('#datatable_pagament_invisibile thead').clone().appendTo('#header');
    var $headers = $('#datatable_pagament_invisibile th');
    $headers.each(function(index, el) {
        $('#header').width($('#datatable_pagament_invisibile').width());
        //$('#header thead th').height($('#datatable_pagament_invisibile thead').height());
        $('#header th').eq($headers.index(this)).width($(this).width());
    });
}