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Js enables the keyboard to press the left and right keys to select text and display it in the text box

Source: Internet
Author: User
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Js enables the keyboard to press the left and right keys to select text and display it in the text box

This example describes how to enable Javascript to enable the keyboard to select text and display it in the text box. Share it with you for your reference. The specific implementation method is as follows:

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<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN"

Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>

<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8">

<Title> SimulateUpDownKeySelect.html </title>

<Style type = "text/css">

# DivSelect {border: 1px solid red; width: 208px! Important; width: 210px ;}

# DivSelect ul {width: 200px; margin: 3px; margin-left:-35px; * margin-left: 3px; overflow: hidden}

# DivSelect ul li {float: left; list-style-type: none; width: 45px; height: 14px; line-height: 20px; font: 14px arial; text-align: center; padding: 2px}

# DivSelect li: hover {background: green; cursor: pointer}

# TxtInput {width: 205px ;}

</Style>

</Head>

<Body>

<Form method = "post" action = "#">

<Input type = "text" id = "txtInput" value = "" autocomplete = "off" onkeydown = "if (event. keyCode = 13) return false;"/>

<! --

Prevents the Enter key from triggering form submission

OnKeyPress

-->

<Div id = "divSelect">

</Div>

<Script type = "text/javascript">

Var list = "<ul>"

List + = "<li> science fiction film </li> <li> war film </li> <li> action film </li> <li> Love Film </li> <li> drama film </li> <li> documentary </li> <li> variety shows </li> <li> comedy </li> <li> cartoons </li> <li> inspirational films </li> <li> horror films </li> <li> costumes </li> <li> TV series </li> <li> reading </li> <li> novels </li> <li> portfolio </li> <li> history </li> <li> poetry </li> <li> prose </li> <li> military </li> ";

List + = "</ul>"

Document. getElementById ('divselect'). innerHTML = list;

</Script>

</Form>

<Script type = "text/javascript">

<! --

Function $ (sId)

{

Return document. getElementById (sId );

}

Function clearSelectedOptBgColor (target)

{

If (target. seletedIndex> = 0)

Target. options [target. seletedIndex]. style. background = "";

}

Function setSelectedOptBgColor (target)

{

Target. options [target. seletedIndex]. style. background = "green ";

}

Var upKeyCode = 38;

Var downKeyCode = 40;

Var enterKeyCode = 13;

Var oInput = $ ("txtInput ");

OInput. options = $ ("divSelect"). getElementsByTagName ("li ");

OInput. seletedIndex =-1;

OInput. focus ();

// OInput. onKeyPress {}

OInput. onkeyup = function (event ){

If (event = undefined)

Event = window. event;

Switch (event. keyCode)

{

Case 37:

ClearSelectedOptBgColor (this );

This. seletedIndex --;

If (this. seletedIndex <0)

This. seletedIndex = this. options. length-1;

This. value = this. options [this. seletedIndex]. innerHTML;

SetSelectedOptBgColor (this );

Break;

Case 38:

ClearSelectedOptBgColor (this );

This. seletedIndex = this. seletedIndex-4;

If (this. seletedIndex <0)

This. seletedIndex = this. options. length-1;

This. value = this. options [this. seletedIndex]. innerHTML;

SetSelectedOptBgColor (this );

Break;

Case 39:

ClearSelectedOptBgColor (this );

This. seletedIndex ++;

If (this. seletedIndex> = this. options. length)

This. seletedIndex = 0;

This. value = this. options [this. seletedIndex]. innerHTML;

SetSelectedOptBgColor (this );

Break;

Case 40:

ClearSelectedOptBgColor (this );

This. seletedIndex = this. seletedIndex + 4;

If (this. seletedIndex> = this. options. length)

This. seletedIndex = 0;

This. value = this. options [this. seletedIndex]. innerHTML;

SetSelectedOptBgColor (this );

Break;

Case enterKeyCode:

This. value = this. options [this. seletedIndex]. innerHTML;

// Alert ('A ')

Break;

}

};

OInput. onblur = function (){

ClearSelectedOptBgColor (this );

This. seletedIndex = 1;

};

// -->

</Script>

</Body>

</Html>

I hope this article will help you design javascript programs.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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