var form = {
  init: function() {
    
    if(!document.getElementById) { return; }
    
    var field       = document.getElementById('email_address');
    field.value     = 'email address';
    field.className = 'non_clicked';
    
    field.onclick = function() {
      this.className = '';
      if(this.value == '' || this.value == 'email address') {
        this.value = '';
      }
    }
    field.onfocus = function() {
      this.className = '';
      if(this.value == '' || this.value == 'email address') {
        this.value = '';
      }
    }
    field.onblur = function() {
      if(this.value == '' || this.value == 'email address') {
        this.className = 'non_clicked';
        this.value     = 'email address';
      }
    }
  }
}