function ValidateForm() {
        if(document.forms[0].State.selectedIndex==0 && document.forms[0].Chain.selectedIndex==0) {
            alert("Please select a chain or a state.");
            return false;
        } 
        document.forms[0].action="Default.aspx";
        document.forms[0].submit();
    }
    
function showSpecialOffer(tsid) {
 $("PU_OfferTruckStop").innerHTML ="";
 $("PU_OfferTitle").innerHTML ="";
 $("PU_OfferText").innerHTML ="<img src=\"images/Loading.gif\" style=\"border:none;\" alt=\"Loading...\"/>";
 $("PU_Link").innerHTML ="";
 $("PU_ExpireDate").innerHTML ="";
 
  var obj = $("spimg_" + tsid);
  var pos = getObjectXY(obj);
  obj = $("PU_Offer"); 
  obj.style.left = (pos.x + 5) + "px";
  obj.style.top = (pos.y - 5) + "px";
  obj.style.visibility = "visible";
  RequestType = "SPOFFER";
  SendPOSTRequest("http://www.truckstopguide.com/GetSpecialOffer.aspx", "tsid="+tsid);
}