Can we add more functions using javascript in Selenium IDE?

Hi I am newbie to selenium.

I came to know that goto_sel_ide.js file which was given in one forum which helps to add the functions like gotoIf, while, label etc.,

Can we create javascript for exit and fo开发者_Go百科r loop like wise?

Please suggest me how to do that?

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you should see the SelBlocks extension, as it has breaks.