<!DOCTYPE html>
<html lang="en-US">
<body>
<script>
Array.prototype.toAlternateCase = function() {
for (i = 0; i < this.length; i++){
//Get one Element, say, "Aston Martin"
var oneElement=this[i];
var temp = "";
//Convertion takes place here
for(j = 0; j < oneElement.length; j++){
if(j%2 == 0)
temp += oneElement[j].replace(oneElement[j], oneElement[j].toUpperCase());
else
temp += oneElement[j].replace(oneElement[j], oneElement[j].toLowerCase());
}
//Replace Actual string with Converted string
this[i]= temp;
}
};
var myCar = ["Aston Martin","Jaguar","Maserati"];
myCar.toAlternateCase();
document.write(myCar[0]);
</script> </body>
</html>