Drag and Drop selected items from a list box to Textbox ?

Question

Hi,
I'm stuck trying to find a solution for my requirement.I know this is possible in windows application but no idea about web application.So Can anyone tell me how to drag and drop to a text box in asp.net web application ?
 
What i need in my web application is, I have a list box and i want user select single or multiple items and drag it from this list box and drop those items to a text box in Asp.net.so how can i do it in asp.net.
 
Thanks in advance.