// text limit
function checkValidInput() {
    // Allow only delete, backspace, left arrow, right arrow, 
    // Tab, ctrl+v and numbers
    $(".storefinderbox, .searchtext").keydown(function(event) {
        if (!((event.keyCode == 46 || 
            event.keyCode == 8  || 
            event.keyCode == 37 || 
            event.keyCode == 39 || 
            event.keyCode == 9) || 
            (event.ctrlKey && event.keyCode == 86) ||  // Edit: Added to allow ctrl+v
            $(this).val().length < 4 &&
            ((event.keyCode >= 48 && event.keyCode <= 57) ||
            (event.keyCode >= 96 && event.keyCode <= 105)))) {
            // Stop the event
            event.preventDefault();
            return false;
        }
    });
    // Edit: Added validate after copy+paste.
    // This removes non-numeric characters and truncates the length
    // to 4 if the user copy + pasted.
    $(".storefinderbox, .searchtext").change(function(event) {
        var value =  $(this).val();
        value = value.replace(/[^0-9]/g,'');
        value = value.substr(0,4);
        $(this).val(value);
    });
}


$(document).ready(function() {
    checkValidInput();
});