function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false;}
else {return true}
}
}function validate_search(thisform)
{
with (thisform)
{
if (validate_required(searchcategory,"Please select your Category!")==false)
  {searchcategory.focus();return false;}  

else

if (validate_required(tb,"Please select your Location!")==false)
  {searchstate.focus();return false;}
}
}