Populating text box from a DME Call

function FORM_OnAfterTransaction(rowNum)
{
var vComp = lawForm.getFormValue("text1");
var vInv = lawForm.getFormValue("text2");
var vCust = lawForm.getFormValue("text3");

//was transaction successful?
if (formState.agsError) return;

for (var rowNum = 0; rowNum < 5; ++rowNum)
{
//get Line Number 
var vLine = lawForm.getDataValue("BUL-LINE-NBR",rowNum);
//alert("Line number is: "+vLine+"; rownumber is "+rowNum);

//reset desc to blank for each detail line

var vDesc  = "";

//Do DME call if there is Line Nbr
if(vLine != "")
{
var s = portalWnd.DMEPath;
s += "?DEV=";
s += "&FILE=BLRILUF";
s += "&FIELD=DESCRIPTION";
s += "&INDEX=BLRSET1";
s += "&KEY=";
s += vComp;
s += "=";
s += vCust;
s += "=";
s += vInv;
s += "=";
s += vLine;     
s += "&XCOLS=TRUE&XKEYS=TRUE&XRELS=TRUE&XCOUNT=TRUE&XIDA=TRUE&OUT=XML";    
//alert("string is "+s)
 
//send DME call to server
var vDMEInfo = portalWnd.httpRequest(s);
//alert(vDMEInfo.xml);
// DME Error Checking
if(!vDMEInfo||vDMEInfo.status)
{
var msg="Error calling DME, ";
msg += (vDMEInfo? "(status code): "+vDMEInfo.status: "bad server response.");
alert(msg);
return true;
}
   
//create an XML object to contain the DME data
var vObjDMEXML = new portalWnd.DataStorage(vDMEInfo);
var vRecords=vObjDMEXML.document.getElementsByTagName("RECORD");
   
if (vRecords.length != 0)
{
var vCols = vRecords[0].getElementsByTagName("COL");
var vDesc = vCols[0].firstChild.data;
lawForm.setFormValue("text12",vDesc,rowNum);

}
}

}
return true;
}