Implement the following script to make your site more secure. For example, add this code to ensure that a visitor's entries into a web form are not 'viewable' by navigating 'back' to the page after the form's submission. Place the following code on the page with the web form.
<script type="text/javascript">
var ele = document.getElementsByTagName('input');
var len = ele.length;
for(var i=0;i<len;i++){
if(ele[i].type == 'text')
ele[i].value='';
}
</script>
Another option is to add the following to your web form: autocomplete = "off"
<form name="form1" id="form1" method="post" autocomplete="off" action="">
Jquery Version
You can add the following into your script or page to clear form fields:
$(this).closest('form').find("input[type=text], textarea").val("");