InfoPath Dev

I found this article on implementing Master Detail cascading drop downs through a browser enabled form.   http://www.sharepoint-tips.com/2007/01/infopath-form-services-implementing.html  but the problem is that I want to get the first value(if exists) slected by default in second drop down n do some calculations on it. how ...

I have two sharepoint Lists Sites(SiteName,Maxworkersallowed) WorkersonSite(workers,Sitename as foriegnkey) I have a browser enabled infopath form for assigning workers to the site.My requirement is to get the related Maxworkersallowed and workers from sharepoint lists to do some calculations when user selects the site from a dropdownlist ...

I have two date picker controls startdate . endDate and a textbox difefrence. Date difference is calculated successfully using http://www.bizsupportonline.net/browserforms/calculate-date-difference-infopath-browser-form-c-sharp-code.htm  but when I publish this form to sharepoint startDate_changed event is not fired. If anyone can help ...

I have a cascading infopath Drop down list control which gets populated from sharepoint list.  Now I want to get the values and do sum calculations with it. Can anyone help how to get the drop down list value at position 1