javascript - Working on a clock script. I need to add a Zero in front of single digits -


as easy may sound seasoned coder. newbie trying implement on clock page. can contain errors. idea generate 0 in front of single digits (like "02" instead of "2") display purposes. works fine double digits. got, doesn't trick. includes commented lines of different tries have done. appreciate input guys.

<script>     $(function() {         getdata();         myinterval = setinterval(getdata, 30000);      });      function getdata(){         var dt = new date();         console.log(dt.getminutes());         var myhr = dt.gethours();         var mymin = dt.getminutes();         //if(myhr < 10) myhrstr = '0' + myhr.tostring(); else myhrstr = myhr.tostring();         //if(myhr.tostring().length < 2) myhrstr = '0' + myhr.tostring(); else myhrstr = myhr.tostring();         //if(myhr.tostring().length < 2) myhr = "0"+myhr;         if(myhr.tostring().length == 1) myhrstr = "0" + myhr.tostring(); else myhrstr = myhr.tostring();           //if(mymin < 10) myminstr = '0' + mymin.tostring(); else myminstr = mymin.tostring();         //if(mymin.tostring().length < 2) myminstr = '0' + mymin.tostring(); else myminstr = mymin.tostring();         //if(mymin.tostring().length < 2) mymin = "0"+mymin;         if(mymin.tostring().length == 1) myminstr = "0" + mymin.tostring(); else myminstr = mymin.tostring();          var mystr = myhrstr + myminstr;         $.ajax(                  {                  url:"clock.php?action=getdata&dt="+mystr,                  success:function(result){                     $('#content').html(result);                     }                    }         );     } </script>

what makes think code isn't working? works fine.

here's demo:

function fakedate() {    this.gethours = function() {      return math.round(math.random() * 23);    }    this.getminutes = function() {      return math.round(math.random() * 59);    }  }    var dt = new fakedate(); // use fakedate random time generations    var myhr = dt.gethours();  var mymin = dt.getminutes();  if (myhr.tostring().length == 1) myhrstr = "0" + myhr.tostring();  else myhrstr = myhr.tostring();    if (mymin.tostring().length == 1) myminstr = "0" + mymin.tostring();  else myminstr = mymin.tostring();    var mystr = myhrstr + myminstr;    console.log(mystr);

one way can simplify code is, since not using numeric values, can call tostring right away on gethours , getminutes methods. same reason there's no need variables hold string values, can use same variable when appending "0". 

// strings representing hours , minutes var myhr = dt.gethours().tostring(); var mymin = dt.getminutes().tostring();  // prepend them zeros if needed if (myhr.length == 1) myhr = "0" + myhr; if (mymin.length == 1) mymin = "0" + mymin;  // concatenate them 4 digit value var mystr = myhr + mymin;

here's demo:

function fakedate() {    this.gethours = function() {      return math.round(math.random() * 23);    }    this.getminutes = function() {      return math.round(math.random() * 59);    }  }    var dt = new fakedate(); // use fakedate random time generations    // strings representing hours , minutes  var myhr = dt.gethours().tostring();  var mymin = dt.getminutes().tostring();    // prepend them zeros if needed  if (myhr.length == 1) myhr = "0" + myhr;  if (mymin.length == 1) mymin = "0" + mymin;    // concatenate them 4 digit value  var mystr = myhr + mymin;    console.log(mystr);


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