<a class="dropdown-toggle" href="#" data-toggle="dropdown">Menu<b class="caret"></b></a>
										<ul class="dropdown-menu">
											<li><a href="findus.php">Find Us</a></li>
											<li><a href="about.php">About Us</a></li>
										</ul>
									</ul>
								</div>
							</div>
						</nav>
					</div>
					<div class="main-content">
						<h1>Graph</h1>
						Select Node
						<?php 
$obj = new Model();
$arr_node = $obj->getNode();
echo '<select name="node" class="node">';
foreach ($arr_node as $val) {
    echo '<option value="' . $val . '">' . $val . '</option>';
}
echo '</select>';
$arr_accel = $obj->getAccel();
?>
						<div id="graph1" style="width:100%; height:320px;"></div>
						<h2>Accel</h2>
						<div class="table-responsive">
						  <table class="table table-striped">
							<thead>
							  <tr>
								<th>timestamp</th>
								<th>node</th>