window.addEvent('load', function() { 
  (function() {

    $$('.textfield').each(function(field) {
      field.addEvent('focus', function(e) {
        if (field.value == 'Suchen') {
          field.value = ''
        }
      })
      
      field.addEvent('blur', function(e) {
        if (field.value.trim() == '') {
          field.value = 'Suchen'
        }          
      })
      
    })
  })()
})