script.js

function compute()
{
    p = document.getElementById("principal").value;
    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 == undefined || principal <= 0)
    {   alert("Enter a Positive Number");
        document.getElementById("principal").focus();
        return
    }
    else
    {
        document.getElementById("result").innerHTML="If you deposit " + "<span class='highlight'>" + principal + "</span>"  + ", <br> at an interest rate of "+ "<span class='highlight'>" + rate + "%</span>" + ",<br> You will receive an amount of " + "<span class='highlight'>" + interest + "</span>" + ", <br> in the year " + "<span class='highlight'>" + year + "</span>";
    }
}

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);

function updateRate() 
{
    var rateval = document.getElementById("rate").value;
    document.getElementById("rate_val").innerText=rateval;
}