Tip: Avoid a Stupid IE7 getElementById Error
Internet Explorer 7 will error and stop processing javascript if you set a variable to the result of document.getElementById when the variable name is the same as the element’s ID. So this will error:
test = document.getElementById('test');
But this will succeed:
my_test = document.getElementById('test');
Stupid to be sure, but at least you can avoid it easily.
Update: A few people wrote in to tell me this can also be avoided by explicitly declaring variables using the var statement, so:
var test = document.getElementById('test');
Will also work if you want to do that instead.