script.js

function compute()
{
    var principal = document.getElementById("principal").value;
    if(principal < 1){
        alert("Enter a positive number")
        document.getElementById("principal").focus();
        return
    }
    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);
    result = document.getElementById("result")
    result.innerHTML = "<p>If you deposit <mark>"+ principal +"</mark>,<br>an interest rate of <mark>" + rate + "%</mark>.<br>You will receive an amount of <mark>"+interest+"</mark>,<br>in the year <mark>"+year+"</mark></p>";

    
}

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