function checkForSubmit(event){
  if(event.keyCode){
    //Explorer...
    if(event.keyCode == 13){
      //submit form...
      doSearch('A');
    }
  } else if(event.which){
    //Mozilla,Netscape,Firefox...
    if(event.which == 13){
      //submit form...
      doSearch('A');
    }
  }
}