JSON sorter by one of the value of its keys

JSON key sorter

function objectByKey(data, keyToSort){
	var objectByKey = new Object();
	objectByKey[keyToSort] = new Object();
    $.each(data, function(i, item){
    	var currentKeyToSort = item[keyToSort];
		if(i == 0){
			objectByKey[keyToSort][currentKeyToSort] = [];
			objectByKey[keyToSort][currentKeyToSort].push(item);
		}else{
			var length = objectLength(objectByKey[keyToSort]);
			var count = 0;
			$.each(objectByKey[keyToSort], function(key, value){
				count++;
				if(currentKeyToSort == key){
					objectByKey[keyToSort][currentKeyToSort].push(item);
					count--;
			 	}else if(count == length){
			 		objectByKey[keyToSort][currentKeyToSort] = [];
			 	 	objectByKey[keyToSort][currentKeyToSort].push(item);
			 	}
			});
		}
	});
    return objectByKey;
}



function objectLength(obj) {
    var count = 0;
    for(var prop in obj) {
        if(obj.hasOwnProperty(prop))
            ++count;
    }
    return count;
}