How to Summarize DD:HH:MM Time Format Field in Summary Reports.

how to show pop up error message(the picklist value  is already selected) when the same value is  selected in picklist field in page block table

How to disable picklist value once it has been chosen in apex page block table.

Can any won explain the code for displaying  list of flat monthly amount data in between one date to another date by clicking search button 

hi
i want to create a standard acount record page in a list of records using check box ,i have entered the checkbox and record names in a page so when i click the check box the respective record name is side to the check box like wise list of records names with check boxes are available in page when i enter submit button by clicking checkbox the respective record name page would want to display in standard.can any one explain the code
 

How to disable picklist value once it has been chosen in apex page block table.

hi
i want to create a standard acount record page in a list of records using check box ,i have entered the checkbox and record names in a page so when i click the check box the respective record name is side to the check box like wise list of records names with check boxes are available in page when i enter submit button by clicking checkbox the respective record name page would want to display in standard.can any one explain the code