jQuery Grid Plugin - jqGrid

I am facing a difficult problem with JqGrid . I know it's not a bug as such. But trying to find out if there is any solution. Let me explain the problem.

My JQuery  js files are hosted in a webserver , say, http://abc.com . Now I have an html page hosted in a different web server , say , http://xyz.com . I have set base href to http://abc.com and included the main jqgrid scripts like below

<script src=”/jquery/plugins/jqgrid/js/jquery.jqGrid.js”

        type=”text/javascript”></script>

<script src=”/jquery/plugins/jqgrid/js/jqModal.js”

        type=”text/javascript”></script>

<script src=”/jquery/plugins/jqgrid/js/jqDnR.js”

        type=”text/javascript”></script>

I see with this approach , js script was loaded fine and it tried to execute the function jqGridInclude() .Then, it tried to call some js files from the path /jquery/plugins/jqgrid/js . But in IE it failed to include them whereas in firefox it was able to load those files.Upon closer inspection into the function I found that jqGridInclude() has the following piece of code which is causing the issue in IE. 

if(jQuery.browser.safari || jQuery.browser.msie ) {

        jQuery.ajax({url:filename,dataType:'script', async:false,
         cache: true});
} else {

        IncludeJavaScript(filename);
}

So,in case of IE , it tried to make the ajax call by referring to the
relative path and it failed.But in firefox it executed the function
IncludeJavaScript() which is putting a script tag dynamically with href set to
a relative path which is working since we have base href set to
http://abc.com , the webserver hosting the js files. Code from IncludeJavaScript function is shown below.

    function IncludeJavaScript(jsFile)
    {
        var oHead = document.getElementsByTagName('head')[0];
        var oScript = document.createElement('script');
        oScript.type = 'text/javascript';
        oScript.src = jsFile;
        oHead.appendChild(oScript);
    };

Please let me know

i)if there is any solution for this scenario.

ii)Also,could anybody please tell me why the jqGrid's approach for loading the internal js files differs from one browser to another.just inquisitive.