text: function compute()
  {
      
      var principal = document.getElementById("principal").value;
      var rate = document.getElementById("rate").value;
      var years = document.getElementById("years").value;
      var interest = principal*years*rate/100;
      var year = new Date().getFullYear()+parseInt(years);
      if(principal<=0){
          alert("Enter a positive number");
          document.getElementById("principal").focus();
          return false;
      }
      document.getElementById("result").innerHTML="If you deposit <mark>"+principal+"</mark>,\<br\>at an interest rate of <mark>"+rate+"</mark>%\<br\>You will receive an amount of <mark>"+interest+"</mark>,\<br\>in the year <mark>"+year+"</mark>\<br\>";
      
  }
  
  function updateRate() 
  {
      var rateval = document.getElementById("rate").value;
      document.getElementById("rate_val").innerText=(rateval+"%");
  }
          