Help with IF/OR statement

iwcnb

I am trying to write an IF statement in the presentation template that look at the DCR field called "Link" and output the data from the DCR.
This is what I am trying to do in pseudo code:

IF dcr.Link IS NOT empty OR NOT EQUAL "^http://" (Regex matching the exact pattern at the beginning of the string)
THEN
Display the dcr.Link data
ENDIF

I have coded like this but I could not get this to work.
<iw_if (expn="{iw_value name='dcr.Link'/}" ne ''" || expn="{iw_value name='dcr.Link'/}" ne ''^http://")>

<iw_then><![CDATA[<a href='<iw_value name='dcr.Link'/>'>Click Here</a><br>]]></iw_then>

</iw_if>



Could you please help me with this and what did I do wrong?
Help is much appreciated!