Hi,Try the following Javascript in the exit event of the textfield in
the row(s):if (this.rawValue == null || this.rawValue == ""){
DropDownList1.validate.nullTest = "disabled";
DropDownList1.assist.toolTip.value = "This field is optional..."; }else{
DropDownList1.validate.nullTest = "error";
DropDownList1.assist.toolTip.value = "This field is mandatory, please
provide a response...";}Hope this works for you,Niall