TextBox auto suggestion for previously entered values is not working

I have created one MVC project in that i have one text box and one submit button these two controls are comes under razor form tag. What i need is when i enter some value into text box and then click submit button actually i search some value using ajax while clicking the submit button. On that time the page will be post back because of using form right. I want search value using ajax but do not post back the page and maintain the value text box and previously entered values get it from browser cookie. I know the page will be post back means the auto suggestion automatically but i don't need post back the page. How can i achieve this. Please help me out whether it is possible or not.

Thanks in advance