function getOutLine()
{
outline="<table "+outlookbar.otherclass+">";
for (i=0;i<(outlookbar.titlelist.length);i++)
{
outline+="<tr><td name=outlooktitle"+i+" id=outlooktitle"+i+" ";
if (i!=outlookbar.opentitle)
outline+=" nowrap align=center style='cursor:hand;background-color:#CC0000;color:#ffffff;height:5;border:1 none navy' ";
else
outline+=" nowrap align=center style='cursor:hand;background-color:#cc0000;color:white;height:5;border:1 none white' ";
outline+=outlookbar.titlelist[i].otherclass
outline+=" onclick='switchoutlookBar("+i+")'><span class=smallFont>";
outline+=outlookbar.titlelist[i].title+"</span></td></tr>";
outline+="<tr><td name=outlookdiv"+i+" valign=top align=center id=outlookdiv"+i+" style='width:100%"
if (i!=outlookbar.opentitle)
outline+=";display:none;height:0%;";
else
outline+=";display:;height:100%;";
outline+="'><div name=outlookdivin"+i+" id=outlookdivin"+i+" style='overflow:auto;width:100%;height:100%'>";
for (j=0;j<outlookbar.itemlist[i].length;j++)
outline+=showitem(outlookbar.itemlist[i][j].key,outlookbar.itemlist[i][j].title);
outline+="</div></td></tr>"
}

outline+="</table>"
return outline

}
这一段JS是实现什么功能的呢