HTML Learning Note--disabled Properties

1. Scope of application: INPUT element, option element in HTML

2, Function: Disable the element. The disabled INPUT element is neither available nor clickable.

3. Example:

① button element with the following code is disabled

<input type= "button" disabled= "false" value= "Test button" >  <input type= "button" disabled= "123" value= "Test button" >  <input type= "button" disabled= "value=" Test button ">  <input type=" button "disabled=" any word "value=" Test Button "> <input type=" button "disabled=true value=" Test Button ">  

② the button element for the following code is enabled, note that false is not "false", and currently only the following two cases are enabled.

<input type= "button" Disabled=false value= "Test Button" >  

4, Application. Allow the button to be clicked only once within 3 seconds.

<input type= "button" value= "Point Me" class= "btn"  /><script>$ (". btn"). "Click", Function () {$ (this). attr ("Disabled", "disabled");        SetTimeout ("$ ('. Btn '). Removeattr (' disabled ')", +);        Alert ("button is clicked"); });</script>