[Артем Enot Грунин]

Вот так (3й раз уже публикую):

function loadArea(sArea)
{
var url = "areas.aspx?";
url += "oId=" + crmFormSubmit.crmFormSubmitId.value;
url += "&oType=" + crmFormSubmit.crmFormSubmitObjectType.value;
url += "&security=" + crmFormSubmit.crmFormSubmitSecurity.value;
url += "&tabSet=" + sArea;

crmForm.all.IFRAME_con.src = url;
}
loadArea("areaActivityHistory");