User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 (.NET CLR 3.5.30729) As far as I can tell, scrollLeft always returns 0 for a simple <input type='text'>, and setting it to any value has no effect. That makes it impossible to scroll such a textbox using JavaScript. Interestingly, scrollWidth and scrollHeight return correct values. Reproducible: Always Actual Results: For a simple <input type='text'>, scrollLeft returns 0, assigning scrollLeft has no effect Expected Results: scrollLeft returns current scroll position, assigning scrollLeft changes scroll position

Looks like a bug 293186. Please see the comments.

in the absence of timwi response, trusting jhorak.