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script.js
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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 amount = parseInt(principal)+ parseFloat(interest);
var result = document.getElementById("result");
var year = new Date().getFullYear() + parseInt(years);
if(principal <= 0){
alert("Please enter a positive number!");
document.getElementById("principal").focus();
} else {
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>" + amount + "</mark>" + ",\<br\> in the year " + "<mark>" + year + "</mark>" + "\<br\>";
}
}
function updateRate() {
var rateval = document.getElementById("rate").value;
document.getElementById("rate_val").innerText = rateval;
}