javascript - convert decimal to hex in table -

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i trying create table similar one:

i want similar this

i uploaded site can viewed here: http://alainwebdesign.ca/cis245/rgb.html

in script file, trying populate "red hex" column modifying generaterandomreds() function so: 

function generaterandomreds(){      for(var i=0; i<11; i++){     var randred = math.random();     randred = randred.tofixed(2);        var sel = document.getelementbyid('genrandomreds');       var opt = document.createelement('option');       opt.innerhtml = randred;       opt.value = randred;       sel.appendchild(opt);        //trying convert decimal hex , populate "red hex"        //column in generate random colors table       //but reason adding code makes 1 random        //red decimal value created , that's it:        var selhex = document.getelementbyid('genredhex');       var opthex = document.createelement('option');       opthex.innerhtml = randred(parseint( number , 10)).tostring(16);       opthex.value = randred(parseint( number , 10)).tostring(16);       selhex.appendchild(opthex);       } }

a created following code explain:

html:

<button type="button" class="btn btn-default" id="generate-btn">genarate random colors</button> <br/><br/> <table class="table">   <thead>    <tr>      <th>rgb values</th>      <th>rgh hexadecimal values</th>      <th>display</th>    </tr>   </thead>   <tbody id="tbody">    </tbody> </table>

javascript:

document.getelementbyid('generate-btn').addeventlistener("click", generaterandom); var tbody = document.getelementbyid('tbody');  function generaterandom() {      tbody.innerhtml = '';      (var = 0; < 11; ++i) {         var randr = (math.random().tofixed(3) * 1000) % 256;         var randg = (math.random().tofixed(3) * 1000) % 256;         var randb = (math.random().tofixed(3) * 1000) % 256;                 var rgbvalue = '(' + randr + ', ' + randg + ', ' + randb + ')';         var tdf = '<td>' + rgbvalue + '</td>';          var hexvalue = '#' + randr.tostring(16) + randg.tostring(16) + randb.tostring(16);         var tdh = '<td>' + hexvalue + '</td>';          var display = '';         var tdd = '<td style="background-color:' + hexvalue + '"></td>';          var tr = '<tr>' + tdf + tdh + tdd + '</tr>'                  tbody.innerhtml = tbody.innerhtml + tr;      } }

in example i'm generating integers rbg numbers. rgb goes 0 255 created random numbers 3 digits max value of 255. convert hexadecimal simple use tostring(16).

see following fiddle: https://jsfiddle.net/alissonmbr/9nb1zq1g/


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