jQuery to restore textbox default value

My code can do When clicking textbox, it empties the textbox. How to use jQuery to restore the default value if the nothing has been entered开发者_如何转开发 in the textbox?

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 $('input').focus(
    function()
    {
      if ($(this).val() == defaultValue)
      {
        $(this).val('');
      }
    })
    .blur(function()
    {
      if ($(this).val() == '')
      {
        $(this).val(defaultValue);
      }
    });

I would detect on load what the defaultValue is to use the user's data for a default if the page is a post back.

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My answer is similar to Phil's where you store the contents in the data() for the object. Sort of like this (demo):

$('textarea')
  .bind('focusin', function(e){
    $(this)
     .data('content', $(this).val())
     .val('');
  })
  .bind('focusout', function(e){
    if ( $(this).val() === '' ){
      $(this).val( $(this).data('content'));
    }
  });

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I wrote a jQuery plugin to do that.

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Assuming you don't want to use placeholders or other HTML5-y goodness, try the following:

$('#myTextbox').click(function(){
   $(this).data('saved-text', $(this).val());
   // Now you can clear your text.
}).focusout(function(){
   $(this).val($(this).data('saved-text'));
});

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You can use something like this:

    var defaultText = 'this is my default text';
    var controlObject = $('#idControl');
    controlObject.val(defaultText);

    controlObject.focusin(function (e) {
        var controlSelected = $(e.target);
        if (controlSelected.val() == defaultText) {
            controlSelected.val('');
        }
    }).focusout(function (e) {
        var controlSelected = $(e.target);
        if (controlSelected.val() == '') {
            controlSelected.val(defaultText);
        }
    });

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I do it this way;

$('#textbox').focus(function(){
    if($(this).val() == 'Enter some text..')
        $(this).val('');
}).blur(function(){
    if($(this).val() == '')
        $(this).val('Enter some text..');
});

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You can use following code for the textbox default value. It works for Textareas too. You just have to apply class "default-value" to all the text fields and textareas to whom you want to attach the default value functionality.

$('.default-value').each(function() {
        $(this).data("default_value",$(this).val());
        $(this).focus(function() {
            if($(this).val() == $(this).data("default_value")) {
                $(this).val("");
            }
        });
        $(this).blur(function() {
            if($(this).val() == '') {
                $(this).val($(this).data("default_value")) ;
            }
        });
    });

Another benifit of this code is that when you submit the form you can check if the field contains the original default value or not.

if( $(elem).val()==$(elem).data("default_value"))
{
 //Contains default value
}
else
{
 //Contains new value
}