Hallo,
das sollte dir zumindest einen Ansatz geben:
Changing the default lookup type
When opening a lookup that can select from multiple entity types, you may want to use a different default entity in the lookup dialog. The following script changes the default entity of the regardingobjectid field in an activity to contacts:
if (crmForm.all.regardingobjectid != null) {
crmForm.all.regardingobjectid.setAttribute("defaulttype", "2");
}
Stammt von http://www.stunnware.com/crm2/contentPage.aspx?id=JS4
mit freundlichen Grüßen
Michael Sulz