<!DOCTYPE html>
<html lang="vi">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Phần mềm Tính toán Chỉ số Y học</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <header>
        <h1>Phần mềm Tính toán Chỉ số Y học</h1>
    </header>
    <main>
        <section class="hero">
            <h2>Chào mừng đến với Phần mềm Tính toán Chỉ số Y học!</h2>
            <p>Phần mềm này giúp bạn tính toán các chỉ số y học quan trọng một cách nhanh chóng và chính xác.</p>
            <button onclick="goToCalculator()">Bắt đầu tính toán</button>
        </section>
        <section class="features">
            <h2>Các tính năng chính</h2>
            <ul>
                <li>Tính toán IMC (Chỉ số Khối cơ thể)</li>
                <li>Tính toán BMR (Tỷ lệ trao đổi chất cơ bản)</li>
                <li>Tính toán Tỷ lệ mỡ cơ thể</li>
                <li>Tính toán Huyết áp</li>
                <li>Và nhiều hơn nữa...</li>
            </ul>
        </section>
        <section class="about">
            <h2>Về chúng tôi</h2>
            <p>Phần mềm này được phát triển bởi đội ngũ chuyên gia y tế với mục tiêu giúp mọi người dễ dàng theo dõi sức khỏe của bản thân.</p>
            <p>Chúng tôi cam kết cung cấp thông tin chính xác và đáng tin cậy.</p>
        </section>
    </main>
    <footer>
        <p>&copy; 2024 Phần mềm Tính toán Chỉ số Y học</p>
    </footer>
    <script src="script.js"></script>
</body>
</html> 

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About HTML

HTML(Hyper Text Markup language) is the standard markup language for Web pages, was created by Berners-Lee in the year 1991. Almost every web page over internet might be using HTML.

Syntax help

Fundamentals

  • Any HTML document must start with document declaration <!DOCTYPE html>
  • HTML documents begin with <html> and ends with </html>
  • Headings are defined with <h1> to <h6> where <h1> is the highest important heading and <h6> is the least important sub-heading.
  • Paragrahs are defined in <p>..</p> tag.
  • Links are defined in <a> tag.

    Example:

    <a href="https://onecompiler.com/html">HTML online compiler</a>
    
  • Images are defined in <img> tag, where src attribute consists of image name.
  • Buttons are defined in <button>..</button> tag
  • Lists are defined in <ul> for unordered/bullet list and <ol> for ordered/number list, and the list items are defined in <li>.

HTML Elements and Attributes

  • HTML element is everything present from start tag to end tag.
  • The text present between start and end tag is called HTML element content.
  • Anything can be a tagname but it's preferred to put the meaningful title to the content present as tag name.
  • Do not forget the end tag.
  • Elements with no content are called empty elements.
  • Elements can have attributes which provides additional information about the element.
  • In the below example, href is an attribute and a is the tag name.

    Example:

    <a href="https://onecompiler.com/html">HTML online compiler</a>
    

CSS

CSS(cascading style sheets) describes how HTML elements will look on the web page like color, font-style, font-size, background color etc.

Example:

Below is a sample style sheet which displays heading in green and in Candara font with padding space of 25px.

body{
  padding: 25px;
}
.title {
	color: #228B22;
	font-family: Candara;
}

HTML Tables

  • HTML Tables are defined in <table> tag.
  • Table row should be defined in <tr> tag
  • Table header should be defined in <th> tag
  • Table data should be defined in <td> tag
  • Table caption should be defined in <caption> tag

HTML-Javascript

  • Javascript is used in HTML pages to make them more interactive.
  • <script> is the tag used to write scripts in HTML
  • You can either reference a external script or write script code in this tag.

Example

<script src="script.js"></script>