How do I make an HTML text box show a hint when empty

Question

I want the search box on my web page to display the word  Search  in gray italics  When the box receives focus  it should look just like an empty text box  If there is already text in it  it should display the text normally  black  non-italics   This will help me avoid clutter by removing the label   BTW  this is an on-page Ajax search  so it has no button

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Here s a functional example with Google Ajax library cache and some jQuery magic   This would be the CSS    lt style type  text stylesheet  media  screen  gt       inputblank   color gray        Class to use for blank input     lt  style gt    This would would be the JavaScript code    lt script language  javascript          type  text javascript          src  http   www google com jsapi  gt   lt  script gt   lt script gt         Load jQuery     google load  jquery    1         google setOnLoadCallback function                 search form                submit function                     alert  Submitted  Value         input first   val                     return false                           keywords                focus function                     if    this  val       Search                           this                       removeClass  inputblank                        val                                                    blur function                     if    this  val                                  this                       addClass  inputblank                        val  Search                                               lt  script gt    And this would be the HTML    lt form id  search form  gt       lt fieldset gt           lt legend gt Search the site lt  legend gt               lt label for  keywords  gt Keywords  lt  label gt           lt input id  keywords  type  text  class  inputblank  value  Search   gt       lt  fieldset gt   lt  form gt    I hope it s enough to make you interested in both the GAJAXLibs and in jQuery

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This is called  watermark    I found the jQuery plugin jQuery watermark which  unlike the first answer  does not require extra setup  the original answer also needs a special call to before the form is submitted

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I like the solution of  Knowledge Chikuse  - simple and clear  Only need to add a call to blur when the page load is ready which will set the initial state      input value  text     blur

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I found the jQuery plugin jQuery Watermark to be better than the one listed in the top answer  Why better  Because it supports password input fields  Also  setting the color of the watermark  or other attributes  is as easy as creating a  watermark reference in your CSS file

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You can set the placeholder using the placeholder attribute in HTML  browser support   The font-style and color can be changed with CSS  although browser support is limited     x000D   x000D  input type search   -webkit-input-placeholder      Safari  Chrome   Opera      x000D   color gray  x000D   font-style italic  x000D    x000D  input type search  -moz-placeholder      Firefox 18-    x000D   color gray  x000D   font-style italic  x000D    x000D  input type search   -moz-placeholder      Firefox 19     x000D   color gray  x000D   font-style italic  x000D    x000D  input type search  -ms-input-placeholder      IE  10       x000D   color gray  x000D   font-style italic  x000D    x000D   lt input placeholder  Search  type  search  name  q  gt  x000D   x000D   x000D

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You could easily have a box read  Search  then when the focus is changed to it have the text be removed   Something like this    lt input onfocus  this value     type  text  value  Search    gt   Of course if you do that the user s own text will disappear when they click   So you probably want to use something more robust    lt input name  keyword   type  text  size  25   style  color  999   maxlength  128  id  keyword   onblur  this value   this value    this defaultValue  this style color     999    onfocus  this value     this style color     000    value  Search Term  gt

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That is known as a textbox watermark  and it is done via JavaScript    http   naspinski net post Text-Input-Watermarks-using-Javascript- IE-Compatible  aspx   or if you use jQuery  a much better approach    http   digitalbush com projects watermark-input-plugin  or code google com p jquery-watermark

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Use a background image to render the text    input foo      input fooempty   background-image  url  blah png        Then all you have to do is detect value    0 and apply the right class     lt input class  foo fooempty  value    type  text  name  bar    gt    And the jQuery JavaScript code looks like this   jQuery function          var target      input foo        target bind  change   function                 if  target val   length  gt  1                         target addClass  fooempty                      else                       target removeClass  fooempty

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Another option  if you re happy to have this feature only for newer browsers  is to use the support offered by HTML 5 s placeholder attribute    lt input name  email  placeholder  Email Address  gt    In the absence of any styles  in Chrome this looks like     You can try demos out here and in HTML5 Placeholder Styling with CSS   Be sure to check the browser compatibility of this feature  Support in Firefox was added in 3 7  Chrome is fine  Internet nbsp Explorer only added support in 10  If you target a browser that does not support input placeholders  you can use a jQuery plugin called jQuery HTML5 Placeholder  and then just add the following JavaScript code to enable it      input placeholder   textarea placeholder    placeholder

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You can add and remove a special CSS class and modify the input value onfocus onblur with JavaScript    lt input type  text  class  hint  value  Search         onfocus  if  this className   hint     this className       this value              onblur  if  this value          this className    hint   this value    Search         gt    Then specify a hint class with the styling you want in your CSS for example   input hint       color  grey

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When the page first loads  have Search appear in the text box  colored gray if you want it to be   When the input box receives focus  select all of the text in the search box so that the user can just start typing  which will delete the selected text in the process  This will also work nicely if the user wants to use the search box a second time since they won t have to manually highlight the previous text to delete it    lt input type  text  value  Search  onfocus  this select       gt

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You can use a attribute called placeholder  quot  quot  Here s a demo   lt html gt   lt body gt     try this out   lt input placeholder  quot This is my placeholder quot   gt   lt  body gt   lt  html gt

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For jQuery users  naspinski s jQuery link seems broken  but try this one  http   remysharp com 2007 01 25 jquery-tutorial-text-box-hints   You get a free jQuery plugin tutorial as a bonus

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Use jQuery Form Notifier - it is one of the most popular jQuery plugins and doesn t suffer from the bugs some of the other jQuery suggestions here do  for example  you can freely style the watermark  without worrying if it will get saved to the database    jQuery Watermark uses a single CSS style directly on the form elements  I noticed that CSS font-size properties applied to the watermark also affected the text boxes -- not what I wanted   The plus with jQuery Watermark is you can drag-drop text into fields  jQuery Form Notifier doesn t allow this    Another one suggested by some others  the one at digitalbrush com   will accidentally submit the watermark value to your form  so I strongly recommend against it

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User AJAXToolkit from http   asp net

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User AJAXToolkit from http   asp net

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You want to assign something like this to onfocus   if  this value    this defaultValue      this value      this className        and this to onblur   if  this value            this value   this defaultValue this className    placeholder     You can use something a bit cleverer  like a framework function  to do the classname switching if you want    With some CSS like this   input placeholder      color  gray      font-style  italic

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input value  text     focus function     if    this  attr  class     hint            this  removeClass  hint          this  val                 input value  text     blur function      if   this  val                    this  addClass  hint          this  val   this  attr  title                lt input type  text  value    title  Default Watermark Text  gt

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I m using a simple  one line javascript solution which works great  Here is an example both for textbox and for textarea        lt textarea onfocus  if  this value     Text     this value          onblur  if  this value          this value    Text      gt Text lt  textarea gt        lt input type  text  value  Text  onfocus  if  this value     Text     this value          onblur  if  this value          this value    Text      gt    only  downside  is to validate at   POST or in Javascript validation before doing anything with the value of the field  Meaning  checking that the field s value isn t  Text

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Simple Html  required  tag is useful    lt form gt   lt input type  text  name  test  id  test  required gt   lt input type  submit  value  enter  gt   lt  form gt    It specifies that an input field must be filled out before submitting the form or press the button submit  Here is example

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I posted a solution for this on my website some time ago   To use it  import a single  js file    lt script type  text javascript  src   hint-textbox js  gt  lt  script gt    Then annotate whatever inputs you want to have hints with the CSS class hintTextbox    lt input type  text  name  email  value  enter email  class  hintTextbox    gt    More information and example are available here

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Now it become very easy  In html we can give the placeholder attribute for input elements   e g    lt input type  text  name  fst name  placeholder  First Name   gt    check for more details  http   www w3schools com tags att input placeholder asp

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The best way is to wire up your JavaScript events using some kind of JavaScript library like jQuery or YUI and put your code in an external  js-file   But if you want a quick-and-dirty solution this is your inline HTML-solution    lt input type  text  id  textbox  value  Search      onclick  if this value   Search   this value     this style color   000         onblur  if this value      this value  Search   this style color   555      gt    Updated  Added the requested coloring-stuff

[javascript] How do I make an HTML text box show a hint when empty?

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