使用EasyUi实现三级联动

请选择： <input id="txtShouName" style="width:170px;">
<input id="txtPipeRowName" style="width:150px;">
<input  id="txtPipeName" style="width:150px;">

// 一层Combo
var srmCombx = $("#txtShouName").combobox({
loader:function(param,success,error){
$.ajax({
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+selectSgId+'',
dataType: 'json',
success: function(data){
data.unshift({equipmentid:'',equipmentname:'全部'});
success(data);
},
error: function(){
error.apply(this, arguments);
}
});
},
onSelect:function(record){  //onSelect 用户点击时触发的事件  在此的意义在于，用户点击一级后自动二级combobox
piperowCombx.combobox({
loader:function(param,success,error){
$.ajax({
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+$("#txtShouName").combobox("getValue")+'',
dataType: 'json',
success: function(data){
data.unshift({equipmentid:'',equipmentname:'全部'});
success(data);
},
error: function(){
error.apply(this, arguments);
}
});
},
onSelect:function(record){ //这里也使用了onSelect事件，在二级combobox被用户点击时触发三级combobox
pipeCombx.combobox({
loader:function(param,success,error){
$.ajax({
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+$("#txtPipeRowName").combobox("getValue")+'',
dataType: 'json',
success: function(data){
data.unshift({equipmentid:'',equipmentname:'全部'});
success(data);
},
error: function(){
error.apply(this, arguments);
}
});
},
valueField: 'equipmentid',
textField: 'equipmentname',
value:'',
editable:false
});
},
onLoadSuccess:function(){  //清空三级下拉框 就是成功加载完触发的事件 当一级combobox改变时，二级和三级就需要清空
pipeCombx.combobox("clear");
pipeCombx.combobox('setValue', '全部'); //给combobox下拉框设置一个值，否则为空不好看
},
valueField: 'equipmentid',
textField: 'equipmentname',
value:'',
editable:false
}).combobox("clear"); //清空二级下拉框

},
valueField: 'equipmentid',
textField: 'equipmentname',
value:'',
editable:false
});
/******************************************************************************************************/
//下面的俩个是组件，

//  二层Combo
var piperowCombx = $("#txtPipeRowName").combobox({
loader:function(param,success,error){
$.ajax({
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+$("#txtShouName").combobox("getValue")+'',
dataType: 'json',
success: function(data){
data.unshift({equipmentid:'',equipmentname:'全部'});
success(data);
},
error: function(){
error.apply(this, arguments);
}
});
},
valueField: 'equipmentid',
textField: 'equipmentname',
value:'',
editable:false
});

//三层Combo
var pipeCombx=$("#txtPipeName").combobox({
loader:function(param,success,error){
$.ajax({
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+$("#txtPipeRowName").combobox("getValue")+'',
dataType: 'json',
success: function(data){
data.unshift({equipmentid:'',equipmentname:'全部'});
success(data);
},
error: function(){
error.apply(this, arguments);
}
});
},
valueField: 'equipmentid',
textField: 'equipmentname',
value:'',
editable:false
});