如何更新Yii中没有刷新页面的下拉列表更改的文本字段？

I have a Yii dropdownlist and text field, when i select the dropdown list item, this name should be displayed in textfield. I tried this concept using ajax with But it updates after page refresh only.I have pasted my code here, please look-through and suggest me how to set textfield after every immediate selection of drop down listed item.I have a Yii dropdownlist and text field, when