我之前使用过CSS,我遇到了下面的CSS样式,不知道它的作用.
a[href^="http:"] {
background: url(img/keys.gif) no-repeat right top;
}
a[href^="http://mysite.com"], a[href^="http://www.mysite.com"] {
background-image: none; padding-right:0;
}
任何人都可以请帮助以下代码.我试图理解多重继承不确定为什么它不起作用.BTW如果是多重继承的代码.谢谢
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Test Doc</title>
<script type="text/javascript">
function classX(){
this.messageX="this is X Message";
this.alertX=function(){
alert(this.messageX);
};
}
function classY(){
this.messageY="this is Y Message";
this.alertY=function(){
alert(this.messageY);
};
}
function classZ(){
classX.apply(this);
classY.apply(this);
this.messageZ="this is Z Message";
this.alertZ=function(){
alert(this.messageZ);
};
}
var abjz=new classZ();
objz.alertZ();
abjz.alertX();
</script>
</head>
<body>
</body>
</html>
我正在尝试创建一个表,当有超过10行时,我想创建一个超链接,告诉用户进入下一页.这个概念叫做分页,但我怎样才能用jQuery/JavaScript实现呢？
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Table</title>
<style type="text/css">
th {
background-color: #ddd;
}
th td {
border: 1px solid black;
}
</style>
</head>
<body>
<table>
<th>Heading1</th>
<th>Heading2</th>
<tbody>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is td</td></tr>
<tr><td>This is td</td><td>This is …我想知道在Javascript中定义继承时inheritFrom和原型之间的区别.
function classA{}
classA.name="abc";
classA.functionName=function(){
alert("Function Name Alert");
}
function classB{ }
以下代码的区别是什么？
classB.prototype=classA();
和
classB.prototype.inheritFrom(classA);
为什么警告打印2在下面的例子中？var a未知函数n ...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Test Doc</title>
<script type="text/javascript">
var a = 1;
function f() {
var a = 2;
function n() {
alert(a);
}
n();
}
f();
</script>
</head>
<body>
</body>
</html>
javascript ×4
inheritance ×2
css ×1
css3 ×1
function ×1
html ×1
html-table ×1
jquery ×1
pagination ×1
public ×1
scope ×1