i want to insert a chatbox in my wordpress blog. i got the HTML code and pasted in the 'arbitrary text or HTML' widget and after i click save, most of the code disappears. have attached the image. pls help. thanks.
Looks like all the iframe code is stripped out for some reason. Not sure why that is, but a possible workaround would be to create your own widget with all the HTML code needed. Check out this article: http://www.bloggingtips.com/2009/06/04/create-your-own-wordpress-widget/
That would work too. It would probably be easier to implement than a custom widget, although you wouldn't get to move it around as easily like you would be able to through the widgets panel.
WP Admin > appearance > theme editor > on right hand side look sidebar.php and paste ur code there where u want. be sure, to give write css style to ur post
have you tried pasting the code into a page/post with the visual editor disabled? (home > admin > users > profile > checkbox)