$col = array();
$col["title"] = "FollowUp<br>Date"; // caption of column
$col["name"] = "followUpDate"; // grid column name, same as db field or alias from sql
$col["editable"] = true; // this column is editable
$col["editoptions"]["placeholder"] = "YYYY-MM-DD";
$col["editoptions"]["defaultValue"] = date("Y-m-d");
$col["width"] = "70"; // Width of the column
// $col["editrules"] = array("required"=>true); // this field is required
// $col["editrules"] = array("date"=>true); //validation for the date format
$col["editrules"] = array("custom"=>true,"custom_func"=>"function(val,label){return my_validation(val,label);}");
$col["editoptions"] = array("onblur"=>"validate_onblur(this)");
$cols[] = $col;




/*Script to check whether entered date is greater than Current Date */
function my_validation(value,label)
{
    var today = new Date();
    var dd = today.getDate();
    var mm = today.getMonth()+1; //January is 0!
    var yyyy = today.getFullYear();

if(dd<10) {
    dd='0'+dd
}

if(mm<10) {
    mm='0'+mm
}

today = yyyy+'-'+mm+'-'+dd;
    if (value > today)
        return [true,""];
    else
        return [false,label+": Please enter a date which is greater than Current Date"];
}
</script>