Jquery Validation Engine

I am working on a wordpress project i have made a custom template for a page i have made a forum now i am applying Validation using a Jquery Validation Engine i am using this code in header.php in <header> tag

<?php
if (is_page_template('order.php')) {?>
<script src="<?php bloginfo('template_directory');?>/js/jquery.js" type="text/javascript">
</script>
<script src="<?php bloginfo('template_directory');?>/js/english.js" type="text/javascript">
</script>
<script src="<?php bloginfo('template_directory');?>/js/jquery.validationEngine.js" type="text/javascript">
</script>
<link rel="stylesheet" href="<?php bloginfo('template_directory'); ?>/js/val.css" type="text/css" />
<?php }?>

There is also a Jquery image slider running in the page
so if i include above code after wp_head() in header.php my validation functions work on form but slider doesnt i get this error

jQuery("div#slider").nivoSlider is not a function

if i place it before wp_head() my validation functions dont work but slider does i know there some conflict i get this error that

jQuery("#formid").validationEngine is not a function

this what i use to bind my form with validation

jQuery(document).ready(function(){
                // binds form submission and fields to the validation engine
                jQuery("#order_frm").validationEngine();
            });