asp.net - Dropdownlists creates postback on key changes in IE -

I have created a label and dropdown list labeled the associated id as dropdown list if I click on the label and Then uses the mouse up or down in the dropdown list, then creates a postback for each click. It is quite arrogant and if you click on the dropdown list and use the key-up or key-down, or if you use any other browser from IE, this does not happen.

Is it possible to fix this, you can use key-ups and key-downs without a postback, and first of all the login key creates a postback (as you would on the dropdown list Click and do not label)?

Set from DropDownList.AutoPostBack to false .