html - Not able to set 'readonly' on text input box -

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Is there any obvious reason why this input box is editable? 

  & lt; Input id = "user name" name = "user name" category = "textfield 70 pc" readonly = "readonly" type = "text" value = "my user name" />

It seems unusable to use javascript / jquery to disable this text box.

If you are searching for it to be grayed out, then unsupported attribute : 

  & lt; Input id = "username" name = "username" ... disabled = "disabled" />

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