/*
JavaScript Bible, Fourth Edition
by Danny Goodman
John Wiley & Sons CopyRight 2001
*/
Custom toString()
function customToString() {
var dataArray = new Array()
var count = 0
for (var i in this) {
dataArray[count++] = this[i]
if (count > 2) {
break
}
}
return dataArray.join(",")
}
var book = {title:"The Aeneid", author:"Virgil", pageCount:543}
book.toString = customToString
A user-defined toString() result:
document.write(book.toString())