diff --git a/application/views/advancerequest.php b/application/views/advancerequest.php
index 40dc45b0..0c15ffac 100755
--- a/application/views/advancerequest.php
+++ b/application/views/advancerequest.php
@@ -306,6 +306,14 @@ function advanceamountCalculation()
 
 function validate()
 {
+
+  if($("#PurchaseOrderNumber").val()=='0')
+   {
+     alert('Please Enter Purchase Order Number');
+     $("#PurchaseOrderNumber").focus();
+    return false;
+   }
+
 	if($("#AdvanceIn").val().length < 1)
 	 {
 		 alert('Please Enter Advance Amount Percentage');