How to know properties of an object ?

Any idea........

try this script

function getProperties() {
var input = prompt('Please enter the element name');
var element = document.createElement( input );
for( var props in element ) {
alert( props );
}

}

The following article discuss this approach in more details:
www.webreference.com/js/column79/9.html

Georgi Kralev

Homepage: gdkralev.googlepages.com