JavaScript array sorting function is simple to implement

The sort() function of JavaScript array is sorted by string size. It cannot sort a set of numbers correctly. The following applet implements the function of sorting a set of numbers through a self-compiled function.

<script>
function mysort(a){
  var n=;
  var newa=[];
  var temp;
  for(var i=0;i<n;i++)
  {
    for(var j=i;j<n;j++)
    {
      if(a[i]>a[j])
      {
        temp=a[i];
        a[i]=a[j];
        a[j]=temp;
       }
     }
     (a[i]);
   }
   return newa;
}

arr=[1,9,5,3,7];
narr=mysort(arr);
(narr);

</script>

The running results of the program are as follows:

Array(5) [ 1, 3, 5, 7, 9 ]

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