//头部输入文本后提示显示的效果
var url = "zipService";
  var validationUrl = "validationServlet";

  function getZipData(zipCode) 
  {
		new Ajax.Updater("rewrite", url, {
			asynchronous: true,
			method: "post",
			parameters: "keyword=" + zipCode + "&type=html",
			onSuccess: function(request) {
				new Effect.Highlight('rewrite');
			},
			onFailure: function(request) {
				assignError(request.responseText);
			}
		});
  }

  function assignError(error) {
	  $("zipError").innerHTML = "Error: " + error;
  }
  

  
 function validateField(fieldname, required, validation, update) {
	var params = "type=" + validation + "&required=" + 
				required + "&value=" + $F(fieldname);
new Ajax.Updater(update, validationUrl, {
  asynchronous: true,
  method: "get",
  parameters: params,
  onLoading: function(request)  {Element.show(fieldname + 'Progress');},
  onComplete: function(request) {Element.hide(fieldname + 'Progress');}
});
  }