trial.html

<div class="container">
    <div class="row">

        <div class="col-sm-12">
            <!--<div class="col-sm-10">
				<td colspan="2" align="center" id="topPannel">
					<?php						
						displayRightMenu();
					?>
				</td>
			</div>-->
            <div class="row">
                <!-- left panel -->
                <div class="col-sm-4" valign="top">
                    <?php
						displayLeftMenu();
					?>
                </div>

                <!-- central panel -->
                <div class="col-sm-6" valign="top">
                    <span style="align:center">
<?php						
						displayContent();
					?>
    </span>
    </div>

    <!-- right panel -->
    <!--<td id="rightPannel" valign="top">
					<?php
						//displayRightMenu();
					?>
				</td>-->
    </div>
    </div>
    </div>
    </div>