jQuery cross browser compatible?

jQuery cross browser compatible?

Hi
I have to use the following to get highcharts library working.any ideas?
<!--[if IE 8]>
<require type='script' src='js/jquery-1.4.2.js' />
<![endif]-->
<!--[if !IE]><!-->
<require type='script' src='js/jquery-1.8.3.js' />
<!--<![endif]-->

After doing the above, it worked in both the browsers.