CRM 2011 Validation On Field Length/ Max Length

Scenario:

Validation needed when certain field exceed amount of character or length.
This is what i coded for the field validation using javascript.

Code:


// Validate Length for Field's eg. ValidateFieldLength(field, 3)
function ValidateFieldLength(attributeName, MaxLength) {

    var MaxLength = Xrm.Page.data.entity.attributes.get(attributeName).getValue();
    //Convertion to String
    var StringMax = MaxLength.toString();
    //Convertion to Int
    var IntMax = parseInt(StringMax.length);

    if (IntMax > MaxLength) {
        alert("Exceeded the maximum length");
        //Set Value Null when exceeded
        Xrm.Page.data.entity.attributes.get(attributeName).setValue(null); 
    }
}

Validation will prompt and the field value will be clear.