get the top-level size of a JavaScript object in all browsers

objectLength.js

// credit to Sam (https://github.com/sambenne) for this
// saving as Gist so I don't lose it.

function objectLength(obj) {
	try {
		return Object.keys(obj).length;
	} catch(err) {
		var total = 0;
		for(var k in obj) {
			if(obj.hasOwnProperty(k)) {
				total++;
			}
		}
		return total;
	}
}