body上设置text-align:center
最外面套作所有内容的div的css上设置：margin:0 autotext-align:left
网页上禁止复制主要靠JavaScript来实现。<BODY oncontextmenu="return false" onselectstart="return false"
ondragstart="return false" onbeforecopy="return false" oncopy=document.selection.empty() onselect=document.selection.empty()>
-----------------------------------------------
防止复制的js
-----------------------------------------------
<SCRIPT language=JavaScript1.2>
function disableselect(e){
return false}
function reEnable(){return true
}
file://if IE4+
document.onselectstart=new Function ("return false")
file://if NS6
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
}
</SCRIPT>
<SCRIPT language=JavaScript type=text/JavaScript>
<!--
function MM_reloadPage(init) {//reloads the window if Nav4 resized
if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
document.MM_pgW=innerWidthdocument.MM_pgH=innerHeightonresize=MM_reloadPage}}
else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload()
}
MM_reloadPage(true)
//-->
</SCRIPT>
-------------------------------------------------------
防止下载的js
-------------------------------------------------------
<noscript><iframe src=""></iframe></noscript>
--------------------------------------------------------
下面是防止右键的js:
--------------------------------------------------------
<script language="JavaScript">
<!--
if (window.Event)
document.captureEvents(Event.MOUSEUP)
function nocontextmenu() {
event.cancelBubble = true
event.returnValue = false
return false
}
function norightclick(e) {
if (window.Event){
if (e.which == 2 || e.which == 3)
return false
}else{
if (event.button == 2 || event.button == 3){
event.cancelBubble = true
event.returnValue = false
return false
}
}
}
document.oncontextmenu = nocontextmenu// for IE5+
document.onmousedown = norightclick// for all others
//-->
</script>
在前端代码中，通常使用div+css来布局用户页面。通过这种组合方式，可以将网页的内容与样式分离，提高了前端开发的速度。下面就来使用div+css来实现两种导航栏的编写吧！1.导航栏一：
<div id='menu'>
<a href="#">链接</a>|
<a href="#">链接</a>|
<a href="#">链接</a>|
<a href="#">链接</a>|
<a href="#">链接</a>
</div>
*{margin:0padding:0}
#menu{
min-width:400px
height:20px
background:#pink
text-align:center
line-height:20px
font-size:10px
}
#menu a{
padding:10px
color:blue
text-decoration:none
font-weight:bold
}
#menu a:hover{color:red}
2.导航栏二：
<ul id="menu">
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
<li><a href="#">首页</a></li>
</ul>
*{margin:0padding:0}
body{min-width:500px}
li{list-style:none}
body{text-align:center}
a{text-decoration:none}
a:hover{color:#BA2636}
#menu{ width:100%height:3.75rembackground:#00A2CA}
#menu li{display:inlineheight:3.75rem}
#menu li a{display:inline-blockpadding:0 1.25remheight:3.75remline-height:3.75rem
color:#FFFfont-weight:boldfont-size:1rem}
#menu li a:hover{background:#0095BB}
