function selectAll(){
 //$('.PList input[@type=checkbox]').set("checked",true);
 $('.PList input[@type="checkbox"]').each(function() {
 this.checked = true;
 });
 }
function unselectAll(){
 //$('.PList input[@type=checkbox]').set("checked",true);
 $('.PList input[@type="checkbox"]').each(function() {
 this.checked = false;
  });
  }