i want to lock/make contorls readonly

at presnt i have this code

TXTADD3.Disabled = True

drpdwncity.Enabled = False

the problem is TXTADD3.readonly(property) is not avaliable. this is a html textbox

secondaly if i use .Disabled = True then the text appears loght/blur . so is there any property by which the controls will be locked and the user cannot make any changes