Client wants add following tracking code on website:

<script type="text/javascript" src="http://www.demo.com/show.php?mpt=[CACHEBUSTER]&mpvc=">
</script>
<noscript>
  <a href="http://www.demo.com/show.php?mpt=[CACHEBUSTER]">
    <img src="http://www.demo.com/show.php?mpt=[CACHEBUSTER]" alt="Click Here" border="0">
</a>
</noscript>

To ensure accurate tracking, they want [CACHEBUSTER] can be replaced by a Time Stamp when page reload.

This is the way we use:

<script type="text/javascript">
var currentTime = new Date(); 
var time_stamp = currentTime.getTime(); 

document.write('<scr' + 'ipt type="text/javascript" src="http://www.demo.com/show.php?var=' + time_stamp + '"></scr' + 'ipt>');
document.write("<noscr' + 'ipt>");
document.write('<a href="http://www.demo.com/show.php?mpt=' + time_stamp + '">');
document.write('<img src="http://www.demo.com/show.php?mpt=' + time_stamp + '" alt="Click Here" border="0"></a>');
document.write('</noscr' + 'ipt>');
</script>