Javascript string scanner?

I'm wondering, is there any way to scan a string in javascript.

e.g, I've got a string abcdefdfdfssdfdssdffdq="HELLO"fdndkjdsnkjdnlkdfns I'd like to scan that string and delete the characters between q=" and " and replace i开发者_开发百科t with GOODBYE is this possible?

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You can use string.replace(regexp/substr,newstring) As in: "abcdefdfdfssdfdssdffdq=\"HELLO\"fdndkjdsnkjdnlkdfns".replace(/".+"/, "\"GOODBYE\"")