Checking for divisible by 2

In JavaScript how do I check to see if an int is divisible by 2?

Jason

if( someNumber % 2 == 0){

}

A little faster than using modulus:

if (foo & 1) {
    // odd
}
else {
    // even
}

It will also always result in 1 for odd numbers regardless if the input is positive or negative, whereas modulus will return -1 for negative odd numbers. It only works for integers though, not floats.