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Can anyone help me how I can able to loop through all the members including values that are objects?

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You can use the following code to achieve that:

for (var key in validation_messages) {

    // skip loop if the property is from prototype

    if (!validation_messages.hasOwnProperty(key)) continue;

    var obj = validation_messages[key];

    for (var prop in obj) {

        // skip loop if the property is from prototype

        if (!obj.hasOwnProperty(prop)) continue;

        // your code

        alert(prop + " = " + obj[prop]);

    }

}

I hope this will help.

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