document properties

//Properties
//Write a JavaScript function displayProperties(value) that displays all the
//properties of the "document" object in alphabetical order. Write a JS
//program docProperties.js that invokes your function with the sample input
//data below and prints the output at the console.


function displayProperties(value) {

    var arr = [];

    for (var property in value) {
        arr.push(property);
    }
    arr.sort();

    for (var element in arr) {

        console.log(arr[element]);
        document.writeln(arr[element]);
    }
}


displayProperties(document);