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 + "
";
}

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

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

People who read this tip also read these tips:

• Writing Web Forms
• Linking Code Behind to the IsPrime Web Service Consumer
• Compiling & Running JScript .NET
• Matching a Response to its Request
• Passing Parameters to A Web Service