header.php

		<div class="container-fluid">
		<div class="header_top" id="home" style="margin-top: -18px;">
			<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
				<a class="navbar-brand" href="index.php" style ="margin-left: -30px;">
					<img src="logo.png" width="300px" style="margin-top: -50px;margin-left: -30px;"></a>
				<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent"
						aria-expanded="false" aria-label="Toggle navigation">
						<span class="navbar-toggler-icon"></span>
				</button>
				<div class="collapse navbar-collapse" id="navbarSupportedContent" style="margin-left: -50px;">
					<ul class="navbar-nav mx-auto tp-nav text-center">
						<li class="nav-item">
							<a class="nav-link" href="index.php">Home
								<span class="sr-only">(current)</span>
							</a>
						</li>
						<li class="nav-item">
							<a class="nav-link" href="login.php">LogIn</a>
						</li>
						<li class="nav-item dropdown">
							<a  class="nav-link dropdown-toggle" href="index.php" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true"
							    aria-expanded="false">
								Register
							</a>
							<div class="dropdown-menu" aria-labelledby="navbarDropdown">
								<a class="dropdown-item" href="student_reg.php">Student</a>
								<div class="dropdown-divider"></div>
								<a class="dropdown-item" href="teacher_reg.php">Teacher</a>
							</div>
						</li>
						<li class="nav-item">
							<a class="nav-link" href="notice.php">Notice</a>
						</li>
						<li class="nav-item">
							<a class="nav-link" href="result.php">Result</a>
						</li>
						<li class="nav-item">
							<a class="nav-link" href="#contact">Contact</a>
						</li>
					</ul>
					<form action="#" method="post" class="form-inline my-2 my-lg-0 search">
						<input class="form-control mr-sm-2" type="search" placeholder="Search here..." name="Search" required="" style="width: 200px;margin-left: 15px;">
						<button style="background-color: black;margin-left: 10px;" class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
					</form>

				</div>
			</nav>
		</div>
		</div>