Let’s see the JavaScript code to submit the form by clicking the link.

<form name="myform" action="index.php">  
Search: <input type='text' name='query' />  
<a href="javascript: submitform()">Search</a>  
</form>  
<script type="text/javascript">  
function submitform()  
{  
  document.myform.submit();  
}  
</script>