Some confusing and uncommon properties are expected to be useful _ basic knowledge

Some confusing and uncommon properties are expected to be used. 1. readonly [text password textarea]
Set the element to the "only available" mode, that is, the "cannot publish" mode. Unlike the "disabled" mode, readonly does not change the character to dark gray.




2. defaultValue [All FORM elements]
The function is to return the VALUE content of the element at its initial settings, that is




3. defaultChecked [checkbox radio]
Like defaultValue, it is used to return whether checkbox or radio is selected during initialization.

4. indeterminate [checkbox]
Set the checkbox to the semi-voting operator
P.s. This attention must be passed through JS settings




5. hideFocus [All table elements] IE5.5 +
Different from onfocus = this. blur, The hideFocus element remains unchanged.




6. UNSELECTABLE [all elements] IE5.5 +
This means that the element will not be selected, that is, to keep the active response of the previous element, the special feature is to use ON | OFF as the negative value, rather than true | false