text: function compute()
  {
  	var principal = document.getElementById("principal").value;
      
      if(principal < 0 || principal == 0){
      	alert ("Enter a positive amount");
   }
   		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="\<br\><br\>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;
  }
  