How to hide a Overall Discount(%) Row in adobe forms

Hi Experts,

I need to hide a row in adobe forms. If the Overall Discount(%) value in sales order is not present then the row will hide.

var Disc = xfa.resolveNodes("xfa.record.FormPurchaseOrder.PriceAndTax.PriceComponent[*]").length;

for (var i=0; i<=Disc; i++) {
var TypeWord = xfa.resolveNode("xfa.record.FormPurchaseOrder.PriceAndTax.PriceComponent["+ i +"].Description").value;

if(TypeWord == "Overall Discount (%)"){
this.rawValue = xfa.resolveNode("xfa.record.FormPurchaseOrder.PriceAndTax.PriceComponent["+ i +"].CalculatedAmount").value;
}
else 
{
Design.tablesf.Table2.Row3.presence = "hidden";

}

}

Now the Discount value present in sales order also hide the Row.

Experts Please help.

Regards,

Sai