function automateRestrictSpam()
  {
    //alert("restricting spam");
    var sss = SpreadsheetApp.getActiveSpreadsheet();
    SpreadsheetApp.getUi().alert("restricting spam");
    var form = sss.getSheetByName("form2");

    var range = form.getRange(1,3,form.getLastRow(),1);
    var lastEntry = range.getCell(form.getLastRow(),1).getValue();
    var data = form.getRange(1,3,form.getLastRow()-1,1).getValues();
    for (var i = 0; i < data.length; i++)
   {
     var row = data[i];
      var entry = row[0];
    if (entry == lastEntry)
        {

         form.getRange(form.getLastRow(),1,1,form.getLastColumn()).clear();
           break;
        }
   }
 }