# AJAX... need to explain xmlHttp.open

**URL:** <https://forum.kirupa.com/t/ajax-need-to-explain-xmlhttp-open/219937>\
**Category:** web dev\
**Created:** [March 21, 2007, 10:04am UTC](https://forum.kirupa.com/t/ajax-need-to-explain-xmlhttp-open/219937 "2007-03-21T10:04:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aasem](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@aasem](https://forum.kirupa.com/u/aasem)\
**Post date:** [March 21, 2007, 10:04am UTC](https://forum.kirupa.com/t/ajax-need-to-explain-xmlhttp-open/219937/1 "2007-03-21T10:04:22Z")

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Can anyone tell me about xmlHttp.open methed… the third argument which boolean, what it specify?