Question

Specify a $target,then it’ll flash itself toward $target,

it’s used to inform user which part is to be filled right when submitting a form.

EDIT:

particularly,what I want to blink is a .

Answer 1

You could make a function like this one. As you didn’t specify how it should blink or how many times, I made it change the background color to red and then after 500 ms change it back to the previous. This will make it seem like it blinks.

  function blink($target) {
    // Set the color the field should blink in
    var backgroundColor = 'red';
    var existingBgColor;

    // Load the current background color
    existingBgColor = $target.css('background-color');

    // Set the new background color
    $target.css('background-color', backgroundColor);

    // Set it back to old color after 500 ms
    setTimeout(function() { $target.css('background-color', existingBgColor); }, 500);
  }

When you want to call the blink function just do this:

function processForm() {
   blink($("#name"));
}

This will work if you have an input field with ID 'name'

---

Blink a select element

HTML:

  <select id="selectList">
    <option>Hello</option>
    <option>World</option>
  </select>

JavaScript (for example on ready):

$(function() { 
   blink($("#selectList")) 
});