(function(){

var old_onload = window.onload || function(){};

window.onload = function(){
  old_onload();

  var fields = [document.getElementById("quick_email"), document.getElementById("quick_zip")];

  for (var i=0; i < fields.length; i++) {
    if (fields[i].type == "text") {
      fields[i].onfocus = function() {
        this.value = "";
        this.onfocus = null;
      };
    }
  }
};

})();