ajax实现输入框文字改变展示下拉列表的效果示例

........省略常规脚本


汽车品牌名：

disabled="disabled" Onfocus="showAndHide('List1','show');" Onblur="showAndHide('List1','hide');"/>

必填*





........省略常规脚本

汽车厂商名：

disabled="disabled" Onfocus="showAndHide('List2','show');" Onblur="showAndHide('List2','hide');" />

必填*

//页面加载的时候

jQuery(function($) {
if (navigator.userAgent.indexOf("MSIE") > 0) {
document.getElementById('generalBrandName').attachEvent("onPropertyChange", appendList);
document.getElementById('brandName').attachEvent("onPropertyChange", appendList);
}
else if (navigator.userAgent.indexOf("Firefox") > 0) {
document.getElementById('generalBrandName').addEventListener("input", appendList, false);
document.getElementById('brandName').addEventListener("input", appendList, false);
}
});

//////// 预加载
jQuery(function($) {
txtValue = $("#generalBrandName").val();
//////// 给txtbox绑定键盘事件
$("#generalBrandName").bind("keyup", function() {
var currentValue = $(this).val();
if (currentValue != txtValue) {
appendList('List1',currentValue);
txtValue = currentValue;
}
});

txtValue = $("#brandName").val();
//////// 给txtbox绑定键盘事件
$("#brandName").bind("keyup", function() {
var currentValue = $(this).val();
if (currentValue != txtValue) {
appendList('List2',currentValue);
txtValue = currentValue;
}
});

});

//实现动态显示下拉列表内容的function

//根据输入框中的值来筛选obj中的值
function appendList(obj,value){
value = encodeURIComponent(value); value = encodeURIComponent(value); //两次使用encodeURI()
switch(obj){
case "List1": //根据车品牌名来刷选List1中的值
$.getJSON(
ctx + "/car/carmodel/**.do",
{keyWord : value, id : new Date().getTime()},
function (json) {
createLis('ListLi1',json);
}
);
break;
case "List2": //根据车厂商名来刷选List2中的值
$.getJSON(
ctx + "/car/carmodel/**.do",
{keyWord : value, id : new Date().getTime()},
function (json) {
createLis('ListLi2',json);
}
);
break;
}
}

function createLis(obj,json){
switch(obj){
case "ListLi1": //根据车品牌名来刷选List1中的值
var executerDiv = document.getElementById(obj); //动态生成下拉列表框
executerDiv.innerHTML="";
var ul=document.createElement("ul");
$.each(json, function (i, item) {
var li=document.createElement("li");
var str = "getValue('generalBrandName','"+item.brandNameGeneral+"','brandIdGeneral','"+item.brandIdGeneral+"');showAndHide('List1','hide')";
li.setAttribute("onmousedown",str);
li.appendChild(document.createTextNode(item.brandNameGeneral));
ul.appendChild(li);
});
executerDiv.appendChild(ul);
break;
case "ListLi2": //根据车厂商名来刷选List2中的值
var executerDiv = document.getElementById(obj); //动态生成下拉列表框
executerDiv.innerHTML="";
var ul=document.createElement("ul");
$.each(json, function (i, item) {
var li=document.createElement("li");
var str = "getValue('brandName','"+item.brandName+"','brandId','"+item.brandId+"');showAndHide('List1','hide')";
li.setAttribute("onmousedown",str);
li.appendChild(document.createTextNode(item.brandName));
ul.appendChild(li);
});
executerDiv.appendChild(ul);
break;
}
}
//显示或者隐藏层
function showAndHide(obj,types){
var Layer=window.document.getElementById(obj);
switch(types){
case "show":
Layer.style.display="block";
appendList(obj,'');
break;
case "hide":
Layer.style.display="none";
break;
}
}

//获取选中节点的内容
function getValue(obj1,str,obj2,idx){
var input=window.document.getElementById(obj1);
input.value=str;
var input=window.document.getElementById(obj2);
input.value=idx;
}