OT - number of chars in querystring

Sorry for this quick OT question -- I'm skimming thru the HTTP spec but can't find anything that defines the character limit in GET requests. I'm writing a form that uses GET to send data to my PHP script, but I'm afraid that if the user enters too many characters then some will get cut off. Does anyone know the actual limit? If not, is there a generally-accepted maximum that is used (to assure compatibility with most user agents and servers)? Erik ---- Erik Price Web Developer Temp Media Lab, H.H. Brown pricee@hhbrown.com