If you’re using the jQuery Validate plugin and are constantly customizing the error messages, here’s a way you can do it all at once. Insert this code anytime after you’ve included the validate plugin.
jQuery.extend(jQuery.validator.messages, { required: "This field is required.", remote: "Please fix this field.", email: "Please enter a valid email address.", url: "Please enter a valid URL.", date: "Please enter a valid date.", dateISO: "Please enter a valid date (ISO).", number: "Please enter a valid number.", digits: "Please enter only digits.", creditcard: "Please enter a valid credit card number.", equalTo: "Please enter the same value again.", accept: "Please enter a value with a valid extension.", maxlength: jQuery.validator.format("Please enter no more than {0} characters."), minlength: jQuery.validator.format("Please enter at least {0} characters."), rangelength: jQuery.validator.format("Please enter a value between {0} and {1} characters long."), range: jQuery.validator.format("Please enter a value between {0} and {1}."), max: jQuery.validator.format("Please enter a value less than or equal to {0}."), min: jQuery.validator.format("Please enter a value greater than or equal to {0}.") });