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April 12, 2012 08:57
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Работа с DOM
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<!-- | |
* Метод document.getElementsByTagName() | |
--> | |
<html> | |
<head> | |
<script type="text/javascript"> | |
function getElements() { | |
var x=document.getElementsByTagName("input"); | |
console.log(x.length); | |
} | |
</script> | |
</head> | |
<body> | |
<p><input type="text" size="20" /></p> | |
<p><input type="text" size="20" /><p> | |
<p><input type="text" size="20" /><p> | |
<p><input type="button" onclick="getElements()" value="Посчитать все элементы input" /><p> | |
</body> | |
</html> |
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<!-- | |
* Метод document.getElementById() | |
--> | |
<html> | |
<head> | |
<script type="text/javascript"> | |
function getValue() { | |
var x=document.getElementById("myHeader"); | |
console.log(x.innerHTML); | |
} | |
</script> | |
</head> | |
<body> | |
<h1 id="myHeader" onclick="getValue()">Заголовок</h1> | |
</body> | |
</html> |
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<!-- | |
* Изменение структуры дерева документа | |
--> | |
<html> | |
<head> | |
<script type="text/javascript"> | |
function modify() { | |
var newElem, | |
newText; | |
newElem = document.createElement("P") | |
newElem.id = "newP" | |
newText = document.createTextNode("Это второй параграф.") | |
newElem.appendChild(newText) | |
document.body.appendChild(newElem) | |
// document.getElementById("emphasis1").childNodes[0].nodeValue = "первый " | |
} | |
</script> | |
</head> | |
<body> | |
<button onclick="modify()">Измени/Добавь текст</button> | |
<p id="paragraph1">Это <em id="emphasis1">единственный</em>параграф на странице.</p> | |
</body> | |
</html> |
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<!-- | |
* Изменение видимости элемента | |
--> | |
<html> | |
<head> | |
<script type="text/javascript"> | |
function hideImage(){ | |
var imgs = document.getElementsByTagName("img"); | |
for (i = 0; i < imgs.length; i++) { | |
var img = imgs[i]; | |
if(img.width == 50 && img.height == 38) { | |
img.style.visibility = 'hidden'; | |
} | |
} | |
} | |
window.onload = hideImage; | |
</script> | |
</head> | |
<body> | |
<img src="kizi.jpg" alt="" width="160" height="120" border="0"> | |
<img src="je.jpg" alt="" width="50" height="38" border="0"> | |
</body> | |
</html> |
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table.globalmenu { | |
background-color: #cccccc; | |
text-align: center; | |
vertical-align: middle; | |
border: solid 1px navy; | |
border-collapse:collapse; | |
padding: 0px; | |
width: 70%; | |
} | |
table.globalmenu td { | |
border: solid 1px navy; | |
height: 25px; | |
width: 100px; | |
padding: 0px; | |
margin: 0px; | |
} | |
div.subMenu { | |
visibility: hidden; | |
position: absolute; | |
background-color: #eeeeee; | |
padding : 0px; | |
border: 1px solid navy; | |
} | |
div.subMenu div { | |
padding : 2px; | |
} | |
.menuItem a:link { | |
color: Maroon; | |
} | |
.menuItem a:visited { | |
color: Maroon; | |
} | |
.menuItem a:hover { | |
color: White; | |
} | |
div.subMenu a:link { | |
color: Navy; | |
} | |
div.subMenu a:visited { | |
color: Navy; | |
} | |
div.subMenu a:hover { | |
color: Yellow; | |
} |
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<html> | |
<head> | |
<title>Пример выпадающего меню</title> | |
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
<script type="text/javascript" src="menu.js"></script> | |
<link href="menu.css" rel="stylesheet" type="text/css"> | |
</head> | |
<body> | |
<!-- Таблица с основными пунктами меню --> | |
<table class="globalmenu"> | |
<tr> | |
<td id="home">Домой</td> | |
<td id="mnuItem1" class="menuItem" onmouseover="OpenSubMenu( 'mnuItem1', 'mnuSubMenu1' );" onmouseout="CloseSubMenu( 'mnuSubMenu1')"> | |
<a href="#">Пункт 1</a> | |
</td> | |
<td id="mnuItem2" class="menuItem" onmouseover="OpenSubMenu( 'mnuItem2', 'mnuSubMenu2' ); " onmouseout="CloseSubMenu( 'mnuSubMenu2' );"> | |
<a href="#">Пункт 2</a> | |
</td> | |
<td id="mnuItem3" class="menuItem" onmouseover="OpenSubMenu( 'mnuItem3', 'mnuSubMenu3' );" onmouseout="CloseSubMenu( 'mnuSubMenu3' );"> | |
<a href="#">Пункт3</a> | |
</td> | |
</tr> | |
</table> | |
Содержимое страницы | |
<!-- Выпадающий блок 1 --> | |
<div class="subMenu" id="mnuSubMenu1" onmouseover="OpenSubMenu( 'mnuItem1', 'mnuSubMenu1' );" onmouseout="CloseSubMenu( 'mnuSubMenu1' );"> | |
<div><a href="#">Ссылка 1</a></div> | |
<div><a href="#">Ссылка 1</a></div> | |
<div><a href="#">Ссылка 1</a></div> | |
<div class="subMenuItem"><a href="#">Дополнительно</a></div> | |
</div> | |
<!-- Выпадающий блок 2 --> | |
<div class="subMenu" id="mnuSubMenu2" onmouseover="OpenSubMenu( 'mnuItem2', 'mnuSubMenu2' );" onmouseout="CloseSubMenu( 'mnuSubMenu2' );"> | |
<div><a href="#">Ссылка 2</a></div> | |
<div><a href="#">Ссылка 2</a></div> | |
<div><a href="#">Ссылка 2</a></div> | |
<div><a href="#">Дополнительно</a></div> | |
</div> | |
<!-- Выпадающий блок 3 --> | |
<div class="subMenu" id="mnuSubMenu3" onmouseover="OpenSubMenu( 'mnuItem3', 'mnuSubMenu3' );" onmouseout="CloseSubMenu( 'mnuSubMenu3' );"> | |
<div><a href="#">Ссылка 3</a></div> | |
<div><a href="#">Ссылка 3</a></div> | |
<div><a href="#">Ссылка 3</a></div> | |
<div><a href="#">Дополнительно</a></div> | |
</div> | |
</body> | |
</html> |
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<!-- | |
Создание оглавления | |
--> | |
<HTML> | |
<HEAD> | |
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
<SCRIPT LANGUAGE="JavaScript"> | |
function Toggle(node) | |
{ | |
// Показываем ветку, если она не видна | |
if (node.nextSibling.style.display == 'none') | |
{ | |
// Меняем рисунок (если рисунок имеется) | |
if (node.childNodes.length > 0) | |
{ | |
if (node.childNodes.item(0).tagName == "IMG") | |
{ | |
node.childNodes.item(0).src = "minus.gif"; | |
} | |
} | |
node.nextSibling.style.display = ''; | |
} | |
// Прячем ветку, если она видна | |
else | |
{ | |
// Меняем рисунок (если рисунок имеется) | |
if (node.childNodes.length > 0) | |
{ | |
if (node.childNodes.item(0).tagName == "IMG") | |
{ | |
node.childNodes.item(0).src = "plus.gif"; | |
} | |
} | |
node.nextSibling.style.display = 'none'; | |
} | |
} | |
</SCRIPT> | |
</HEAD> | |
<BODY> | |
<H1>DHTML Дерево</H1> | |
<BR /><BR /> | |
<HR /> | |
<TABLE BORDER=0> | |
<TR><TD> | |
<TABLE BORDER=0><TR><TD><IMG SRC="leaf.gif"> Анализ<DIV> | |
</DIV></TD></TR></TABLE> | |
</TR></TD> | |
<TR><TD> | |
<TABLE BORDER=0><TR><TD><A onClick="Toggle(this)"><IMG SRC="minus.gif"> Применение</A><DIV> | |
<TABLE BORDER=0><TR><TD WIDTH=10></TD><TD><IMG SRC="leaf.gif"> PHP<DIV> | |
</DIV></TD></TR></TABLE> | |
<TABLE BORDER=0><TR><TD WIDTH=10></TD><TD><A onClick="Toggle(this)"><IMG SRC="minus.gif"> Visual C++</A><DIV> | |
<TABLE BORDER=0><TR><TD WIDTH=10></TD><TD><IMG SRC="leaf.gif"> Проблемы утечки памяти<DIV> | |
</DIV></TD></TR></TABLE> | |
<TABLE BORDER=0><TR><TD WIDTH=10></TD><TD><IMG SRC="leaf.gif"> Проблемы баз данных<DIV> | |
</DIV></TD></TR></TABLE> | |
</DIV></TD></TR></TABLE> | |
</DIV></TD></TR></TABLE> | |
</TR></TD> | |
<TR><TD> | |
<TABLE BORDER=0><TR><TD><IMG SRC="leaf.gif"> Design<DIV></DIV> | |
</TD></TR></TABLE> | |
</TR></TD> | |
</TABLE> | |
<BR><BR> | |
<HR> | |
</BODY> | |
</HTML> |
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