<form class="mainsearch" action="<?php bloginfo('url'); ?>/" method="get">
	<input class="keyword" type="text" name="s" id="s" value="Search ..." onfocus="if (this.value == 'Search ...') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Search ...';}"/>
	<input class="submit" value="" type="submit"/>
</form>