If you want to work in Denmark, a good starting point is to download the Danish Ministry of Employment's leaflet "Working in Denmark - a guide to the Danish labour market."

The leaflet is aimed at foreign workers and enterprises in Denmark and contains relevant information on conditions and rules on the Danish labour market. The leaflet was revised in May 2009 following the termination of the Danish transitional arrangement for migrant workers from the countries joining the EU in 2004/ 2007 on 1 May 2009. 
 
We hope that the leaflet serves the purpose of giving potential migrant workers up-to-date information about the most important conditions and rules on the Danish labour market.
 
At the Ministry's website www.bm.dk you can read the leaflet in respectively Danish, English, German and Polish.