Show all Hidden Inputs on a Single Page (JavaScript)

// gather ALL the inputs
var inputs = document.getElementsByTagName("input");
for (x in inputs){
    if(typeof inputs[x] != 'object'){
        // if it wasn't actually an HTML element, skip it
        continue;
    }
    if(inputs[x].getAttribute('type') == 'hidden'){ // ensure it's a *HIDDEN* element
        alert(inputs[x].getAttribute('name') + " : " + inputs[x].getAttribute('value'));
    }
}