jQuery Grid Plugin - jqGrid

Hiya,

I am using the checkOnUpdate:true option and I would like to change the position where the dialog appears.  It seems to always appear at the bottom near the save/cancel buttons.

I would like to be able to center it in the middle of the form.

At about line 940 of grid.formedit.js I found this:

     if(rp_ge.checkOnSubmit || rp_ge.checkOnUpdate) {
                                        bS  ="<a href='javascript:void(0)' id='sNew' class='fm-button ui-state-default ui-corner-all' style='z-index:1002'>"+p.bYes+"</a>";
                                        bN  ="<a href='javascript:void(0)' id='nNew' class='fm-button ui-state-default ui-corner-all' style='z-index:1002'>"+p.bNo+"</a>";
                                        bC  ="<a href='javascript:void(0)' id='cNew' class='fm-button ui-state-default ui-corner-all' style='z-index:1002'>"+p.bExit+"</a>";
                                        var ii, zI = p.zIndex  || 999; zI ++;
                                        if ($.browser.msie && $.browser.version ==6) {
                                                ii = '<iframe style="display:block;position:absolute;z-index:-1;filter:Alpha(Opacity=\'0\');" src="javascript:false;"></iframe>'
                                        } else { ii="";}
                                        $("<div class='ui-widget-overlay jqgrid-overlay confirm' style='z-index:"+zI+";display:none;'>&#160;"+ii+"
</div><div class='confirm ui-widget-content ui-jqconfirm' style='position:relative; top:-200px; left:50px; z-index:"+(zI+1)+"'>"+p.saveData+"<br/>
<br/>"+bS+bN+bC+"</div>").insertAfter("#"+frmgr);
                                        $("#sNew","#"+IDs.themodal).click(function(){

I added the text in red and it works...however, that is hard coded and I am not sure what variables etc I should use to figure out the height/width of the current form.

Can someone help me?

Thanks,

Jim