javascript form validation check for first part of word

i want my form to check for a certain word in a login field. if the user enters home/username i want it to yell at them and tell them not to include "home/" when entering their username. i've found all sort of help on form validation for javascript, but none of it talks about checking for a first part of a word. thanks.

You could use a regular expression. Google for regular expressions and javascript. The other way would be to loop through each of the first 5 letters in the login field value and see if it adds up to 'home/'.

Hope this helps.