how to display table content based on content(variable) from ListBox
You should not filter the data in Script initially, you should all the data. Qlikview automatically filters data if you select any value in Listbox if there is mapping / link between the fields. This is the default behaviour of Qlikview.
You should not load the file everytime you select in Listbox.
Can you attach sample file and with detailed description of what you want.