March 14, 2000 - Printing an Object's Properties | WebReference

March 14, 2000 - Printing an Object's Properties

Yehuda Shiran March 14, 2000
Printing an Object's Properties
Tips: March 2000

Yehuda Shiran, Ph.D.
Doc JavaScript

The 
for...in

loop loops through the existing properties of a given object. It repeats a variable over all of the object's properties. Take a look at the following script segment:

var result = " ";
for (curProperty in document) {
  result += "document." + curProperty + "
";
}
The script prints the properties belonging to the document object:

document.length
document.elements
document.forms
document.links
...
...

Learn more about the in operator in Column 59, IE 5.5's New Operators.