text: /**
   * Function to compute the interest rate based on the user inputs.
   */
  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 to update the interest rate on the result element.
   */
  function updateRate()
  {
      var rateval = document.getElementById("rate").value;
      document.getElementById("rate_val").innerText = parseFloat(rateval).toFixed(2) + "%";
  }
  