dear friends.. what do i need to install so i write script for netsuite

As per NetSuite: We can choose Eclipse IDE, as NetSuite is providing a plugin for that and we can upload scripts into NetSuite directly from the IDE itself(We need to configure this first). All these stuff available in Suite Answers with detailed info. Other than this, we can use normal text editors, Notepad++ or any, with all these you need to upload script manually into NetSuite.