jQuery uses EasyUi to achieve the effect of three level linkage drop down box

Don't say anything else, using easyui to realize three-level linkage is mainly one layer to set one layer, and everyone looks at the code

html Form

<input id="txtPipeRowName" style="width:150px;">    
<input id="txtPipeName" style="width:150px;"> 

Combobox for easyUi:

// 1 Layer Combo 
var srmCombx = $("#txtShouName")combobox({ 
loader:function(param,success,error){ 
  $ajax({ 
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+selectSgId+'', 
dataType: 'json', 
success: function(data){ 
dataunshift({equipmentid:'',equipmentname:' All '}); 
success(data); 
}, 
        error: function(){ 
errorapply(this, arguments); 
} 
}); 
  }, 
  onSelect:function(record){ //onSelect  Events triggered when the user clicks   The significance here is that the user clicks 1 Automatic after stage 2 Grade combobox 
  piperowCombxcombobox({ 
loader:function(param,success,error){ 
  $ajax({ 
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+$("#txtShouName")combobox("getValue")+'', 
dataType: 'json', 
success: function(data){ 
dataunshift({equipmentid:'',equipmentname:' All '}); 
success(data); 
}, 
        error: function(){ 
errorapply(this, arguments); 
} 
}); 
  }, 
  onSelect:function(record){ // It is also used here onSelect Event, in 2 Grade combobox Triggered when clicked by the user 3 Grade combobox 
  pipeCombxcombobox({ 
loader:function(param,success,error){ 
  $ajax({ 
url: '${CTX_ROOT}/TEquipmentsController?method=getEquipmentByParId&id='+$("#txtPipeRowName")combobox("getValue")+'', 
dataType: 'json', 
success: function(data){ 
dataunshift({equipmentid:'',equipmentname:' All '}); 
success(data); 
}, 
        error: function(){ 
errorapply(this, arguments); 
} 
}); 
  }, 
  valueField: 'equipmentid',   
  textField: 'equipmentname', 
  value:'', 
  editable:false 
}); 
  }, 
  onLoadSuccess:function(){ // Empty 3 Stage drop-down box   Is to successfully load the triggered event   When 1 Grade combobox When it changes, 2 Grade sum 3 Level needs to be emptied  
  pipeCombxcombobox("clear"); 
  pipeCombxcombobox('setValue', ' All '); // To combobox Drop-down box setting 1 A value, otherwise it will not look good if it is empty  
  }, 
  valueField: 'equipmentid',   
  textField: 'equipmentname', 
  value:'', 
  editable:false 
})combobox("clear"); // Empty 2 Stage drop-down box  
 
  }, 
  valueField: 'equipmentid',   
  textField: 'equipmentname', 
  value:'', 
  editable:false 
}); 
/*******************************/ 
// The following two are components,  
 
// 2 Layer 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){ 
dataunshift({equipmentid:'',equipmentname:' All '}); 
success(data); 
}, 
        error: function(){ 
errorapply(this, arguments); 
} 
}); 
  }, 
  valueField: 'equipmentid',   
  textField: 'equipmentname', 
  value:'', 
  editable:false 
}); 
 
//3 Layer 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){ 
dataunshift({equipmentid:'',equipmentname:' All '}); 
success(data); 
}, 
        error: function(){ 
errorapply(this, arguments); 
} 
}); 
  }, 
  valueField: 'equipmentid',   
  textField: 'equipmentname', 
  value:'', 
  editable:false 
});