Iam displaying a campaigns on opportunity detail page using a visual force page and when the campaign is clicked which is displauyed on opportunity campign detail is opening in that visual force page (block in opportunity page). when the campaign is clicked it should open  in a new window 

can anyone help me doing that 

Apex trigger Test2 caused an unexpected exception, contact your administrator: Test2: execution of BeforeUpdate caused by: System.ListException: List index out of bounds: 1: Trigger.Test2: line 63, column 1

can any one help me 

While comparing dates iam getting an error in SOQL query

error is Invalid bind expression comparing datetime and date 

sa cany anyone help me on this error

Error: Compile Error: Variable does not exist: oldContact.ID at line 49 column 24

 if (oldContact.ID == opp.PRINCIPAL_OWNER__C)

for the above line it was showing the error 

can any one help me

Iam displaying a campaigns on opportunity detail page using a visual force page and when the campaign is clicked which is displauyed on opportunity campign detail is opening in that visual force page (block in opportunity page). when the campaign is clicked it should open  in a new window 

can anyone help me doing that