>Thank you (and Viv). For me it is important to log the IP of a user who submits within several seconds. Basically I am troubleshooting the following issue. Users submits duplicate orders by Submitting and then clicking on Back and Submitting again. They claim that they don't do it. And the only way I can prove to them (and to myself) is by logging every Submit with the IP and order number. So two submits within seconds with the consecutive order numbers and the same "IP" will show the trend.

Try to disable the button before submitting the request. That should resolve most of those duplicate-type hits.

Here is an example:

<input type="submit" name="LabelSubmit" value="Cancel" onclick="ButtonOperation(this,'ViewPageGenericConfirmationMessage.aspx');
 return false;" id="LabelSubmit" style="width:150px;" />

function ButtonOperation(toButton,tcUrl,tcMessage)
{
   toButton.disabled=true
   lcMessage=''
   lcUrl=''
   if (tcUrl==null)
   {
      lcUrl=''
   }
   else
   {
      lcUrl=tcUrl
   }
   if (tcMessage==null)
   {
      lcMessage=''
   }
   else
   {
      lcMessage=tcMessage
      lcMessage=lcMessage.replace('\\','\\\\')
      lcMessage=lcMessage.replace("'","\\'")
      lcMessage=lcMessage.replace('"','\\"')
   }
   if (lcMessage.length>0)
   {
      if (confirm(lcMessage))
      {
         if (lcUrl.length>0)
         {
            location.href=lcUrl
         }
         else
         {
            loForm=document.getElementById("Form1")
            loForm.submit()
         }
      }
      else
      {
         toButton.disabled=false
      }
   }
   else
   {
      if (lcUrl.length>0)
      {
         location.href=lcUrl
      }
      else
      {
         loForm=document.getElementById("Form1")
         loForm.submit()
      }
   }
}

It does not have to be that complicated. It is just that I want to support a confirmation message sometimes so I built a generic javascript function for that.