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