I think I figured what I want.
THis is it. TO insert
<!-- Search box -->
<td class="search">
<!-- Search box-->
<form method="get" id="searchform" action="<?php bloginfo('url'); ?>/">
<table cellpadding="0" cellspacing="0" align="left">
<tr>
<td class="box"><input type="text" class="textbox searchbox" name="s" id="s" placeholder="Search" size="41"/>
</td>
<td ><input type="submit" id="searchsubmit" value=" " class="button searchbutton" /></td>
</tr>
</table>
</form>
<!-- Search box-->
inside this <div class="cont"><?php the_content;?>
How to do it.?