1) Nielsen's First Law of Web Usability: People spend most of their time on _other_ people's websites. This wouldn't save anybody any amount of time at all.
2) This is virtually impossible to implement, input textboxes are very not hack-friendly.
A password input box without a border, really? Surely you wouldn't have the username be an ugly fixed-width font, so how do you know how wide the username is?
Have fun detecting when the cursor has reached the left most edge of the password box, and focus should be transferred back to the username box and the cursor set to the rightmost edge of the username box, and vice versa. When someone tries to select text from both username and password boxes, seeing as they appear to be one contiguous textbox, there's no way to avoid somehow violating user expectations.
2) This is virtually impossible to implement, input textboxes are very not hack-friendly.
A password input box without a border, really? Surely you wouldn't have the username be an ugly fixed-width font, so how do you know how wide the username is?
Have fun detecting when the cursor has reached the left most edge of the password box, and focus should be transferred back to the username box and the cursor set to the rightmost edge of the username box, and vice versa. When someone tries to select text from both username and password boxes, seeing as they appear to be one contiguous textbox, there's no way to avoid somehow violating user expectations.