Create link from text input

Create link from text input

Hi,

Using this as a starter I am trying to take some text, append to an existing url and create a link. The text I am taking is from input.Postcode and is appended to http://maps.google.co.uk/maps?q= and then converted to a link to be placed in input.Map_Link

So far I have 
  1. input.Map_Link = (((("<a href='http://maps.google.co.uk/maps?q=" + input.Postcode + "' target='_blank'> ") + " http://maps.google.co.uk/maps?q=") + input.Postcode) + ) "</a>";
...which is not working.

Very much a beginner...any ideas?

Adam