function onFocusSearch(obj){
  if (!obj.changed) obj.value = '';
  obj.style.color = '#000000';
}

function onBlurSearch(obj,DefText){
  if (!obj.value) {
  	obj.changed = false;
    obj.value = DefText?DefText:'Search';
    obj.style.color = '#7f7f7f';
  } else {
  	obj.changed = true;
  }  
}

function checkSearch(obj,AlertMsg) {
  if (!obj.changed  || obj.value == '') {
    alert(AlertMsg?AlertMsg:'Enter search keywords!');
    return false;
  }
  return true;
}