什么是HTML,它的语法构成是什么

什么是HTML,它的语法构成是什么,第1张

<HTML>

<HEAD>

<TITLE>每天进步一点点</TITLE>

</HEAD>

<BODY bgcolor=#CCFFFF>

网页设计全方位学习

<hr>

<p>网站开发是一门新生的科学</p>

</BODY>

</HTML>

HTML语言的组成:

HTML文档由HTML,HEAD和BODY三大元素构成。

<HTML>是最外层的元素,表示文档的开始,浏览器从<HTML>开始解释

<HEAD>是HTML文件头标记符,即文档头。包含对文档基本信息(包含文档标题,文档搜索关键字,文档生成器等属性)描述的标记

<BODY>位于首部下面,用于定义一个HTML文档的主体部分,包含对网页元素(文本,表格,图片,动画和链接等)描述的标记。

HTML的语法:

HTML语法由标签(Tags)和属性(Attributes)组成。标签又称标记符,HTML是影响网页内容显示格式的标签集合,浏览器主要根据标签来决定网页的实际显示效果。在HTML中,所有的标签都是用尖括号括起来。

标签可分为单标签和多标签两种:

单标签:

单标签的形式为<标签 属性=参数>,

最常见的如强制换行标签<BR>,分隔线标签<HR>,插入文本框标签<INPUT>

双标签:

双标签的形式为<标签 属性=参数>对象</标签>

如定义“奥运”两个字为5号,颜色为红色的标签为:<font size=5 color=red>奥运 </font>

HTML (Hypertext Markup Language) 是一种用于创建网页的标准语言。它使用标记标签来描述网页的结构和内容。浏览器解析 HTML 代码并将其显示为网页。

HTML 标签是由尖括号包围的关键字,如 <html>和 </html>。标签通常成对出现,用于定义元素的开始和结束。例如 <p>表示段落的开始, </p>表示段落的结束。

HTML 文档由一系列标签组成,每个标签都定义了文档的不同部分。例如 <head>标签定义了文档的头部,<body>标签定义了文档的正文。

HTML 的最新版本为 HTML5,它增加了许多新标签和特性,比如支持多媒体元素,更好的表单处理和更强大的本地存储功能。

分类: 电脑/网络 >>程序设计 >>其他编程语言

问题描述:

类似于按F3的功能~!

只搜索当前页中是文字~!

不要查询数据库

解析:

<>

<head>

<meta -equiv="Content-Language" content="zh-">

<meta -equiv="Content-Type" content="text/charset=gb2312">

<title>test</title>

</head>

<body class="page_speeder_724936674">

<script language="JavaScript">

var NS4 = (documentyers)Which browser?

var IE4 = (document.all)

var win = windowwindow to search.

var n = 0

function findInPage(str) {

var txt, i, found

if (str == "")

return false

Find next occurance of the given string on the page, wrap around to the

start of the page if necessary.

if (NS4) {

Look for match starting at the current point. If not found, rewind

back to the first match.

if (!win.find(str))

while(win.find(str, false, true))

n++

else

n++

If not found in either direction, give message.

if (n == 0)

alert("本页没有查到.")

}

if (IE4) {

txt = win.document.body.createTextRange()

Find the nth match from the top of the page.

for (i = 0i <= n &&(found = txt.findText(str)) != falsei++) {

txt.moveStart("character", 1)

txt.moveEnd("textedit")

}

If found, mark it and scroll it into view.

if (found) {

txt.moveStart("character", -1)

txt.findText(str)

txt.select()

txt.scrollIntoView()

n++

}

Otherwise, start over at the top of the page and find first match.

else {

if (n >0) {

n = 0

findInPage(str)

}

Not found anywhere, give message.

else

alert("本页没有查到此题目,请尝试用下百度的搜索引擎在网上查下.")

}

}

return false

}

</script>

<div id="floater" class="page_speeder_1555397322">

<div align=center class="page_speeder_1173002127">

<script language=JavaScript>

self.onError=null

currentX = currentY = 0

whichIt = null

lastScrollX = 0lastScrollY = 0

NS = (documentyers) ? 1 : 0

IE = (document.all) ? 1: 0

<!-- STALKER CODE -->

function heartBeat() {

if(IE) { diffY = document.body.scrollTopdiffX = document.body.scrollLeft}

if(NS) { diffY = self.pageYOffsetdiffX = self.pageXOffset}

if(diffY != lastScrollY) {

percent = .1 * (diffY - lastScrollY)

if(percent >0) percent = Math.ceil(percent)

else percent = Math.floor(percent)

if(IE) document.all.floater.style.pixelTop += percent

if(NS) document.floater.top += percent

lastScrollY = lastScrollY + percent

}

if(diffX != lastScrollX) {

percent = .1 * (diffX - lastScrollX)

if(percent >0) percent = Math.ceil(percent)

else percent = Math.floor(percent)

if(IE) document.all.floater.style.pixelLeft += percent

if(NS) document.floater.left += percent

lastScrollX = lastScrollX + percent

}

}

<!-- /STALKER CODE -->

<!-- DRAG DROP CODE -->

function checkFocus(x,y) {

stalkerx = document.floater.pageX

stalkery = document.floater.pageY

stalkerwidth = document.floater.clip.width

stalkerheight = document.floater.clip.height

if( (x >stalkerx &&x <(stalkerx+stalkerwidth)) &&(y >stalkery &&y <(stalkery+stalkerheight))) return true

else return false

}

function grabIt(e) {

if(IE) {

whichIt = event.srcElement

while (whichIt.id.indexOf("floater") == -1) {

whichIt = whichIt.parentElement

if (whichIt == null) { return true}

}

whichIt.style.pixelLeft = whichIt.offsetLeft

whichIt.style.pixelTop = whichIt.offsetTop

currentX = (event.clientX + document.body.scrollLeft)

currentY = (event.clientY + document.body.scrollTop)

} else {

window.captureEvents(Event.MOUSEMOVE)

if(checkFocus (e.pageX,e.pageY)) {

whichIt = document.floater

StalkerTouchedX = e.pageX-document.floater.pageX

StalkerTouchedY = e.pageY-document.floater.pageY

}

}

return true

}

function moveIt(e) {

if (whichIt == null) { return false}

if(IE) {

newX = (event.clientX + document.body.scrollLeft)

newY = (event.clientY + document.body.scrollTop)

distanceX = (newX - currentX)distanceY = (newY - currentY)

currentX = newXcurrentY = newY

whichIt.style.pixelLeft += distanceX

whichIt.style.pixelTop += distanceY

if(whichIt.style.pixelTop <document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop

if(whichIt.style.pixelLeft <document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft

if(whichIt.style.pixelLeft >document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20

if(whichIt.style.pixelTop >document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5

event.returnValue = false

} else {

whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY)

if(whichIt.left <0+self.pageXOffset) whichIt.left = 0+self.pageXOffset

if(whichIt.top <0+self.pageYOffset) whichIt.top = 0+self.pageYOffset

if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17

if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17

return false

}

return false

}

function dropIt() {

whichIt = null

if(NS) window.releaseEvents (Event.MOUSEMOVE)

return true

}

<!-- DRAG DROP CODE -->

if(NS) {

window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN)

window.onmousedown = grabIt

window.onmousemove = moveIt

window.onmouseup = dropIt

}

if(IE) {

document.onmousedown = grabIt

document.onmousemove = moveIt

document.onmouseup = dropIt

}

if(NS || IE) action = window.setInterval("heartBeat()",1)

</script>

<form name=search onSubmit="return findInPage(this.string.value)">

<font size=3><font color="#FF0000"><br>

请输入关键字:<br>

</font><br>

<input name=string type=text size=10 onChange="n = 0"><br>

</font><br>

<input type=submit value="查找">

<input type=submit value="继续查"><br>

</form>

</div>

</div>

<script language=JavaScript>

self.onError=null

currentX = currentY = 0

whichIt = null

lastScrollX = 0lastScrollY = 0

NS = (documentyers) ? 1 : 0

IE = (document.all) ? 1: 0

<!-- STALKER CODE -->

function heartBeat() {

if(IE) { diffY = document.body.scrollTopdiffX = document.body.scrollLeft}

if(NS) { diffY = self.pageYOffsetdiffX = self.pageXOffset}

if(diffY != lastScrollY) {

percent = .1 * (diffY - lastScrollY)

if(percent >0) percent = Math.ceil(percent)

else percent = Math.floor(percent)

if(IE) document.all.floater.style.pixelTop += percent

if(NS) document.floater.top += percent

lastScrollY = lastScrollY + percent

}

if(diffX != lastScrollX) {

percent = .1 * (diffX - lastScrollX)

if(percent >0) percent = Math.ceil(percent)

else percent = Math.floor(percent)

if(IE) document.all.floater.style.pixelLeft += percent

if(NS) document.floater.left += percent

lastScrollX = lastScrollX + percent

}

}

<!-- /STALKER CODE -->

<!-- DRAG DROP CODE -->

function checkFocus(x,y) {

stalkerx = document.floater.pageX

stalkery = document.floater.pageY

stalkerwidth = document.floater.clip.width

stalkerheight = document.floater.clip.height

if( (x >stalkerx &&x <(stalkerx+stalkerwidth)) &&(y >stalkery &&y <(stalkery+stalkerheight))) return true

else return false

}

function grabIt(e) {

if(IE) {

whichIt = event.srcElement

while (whichIt.id.indexOf("floater") == -1) {

whichIt = whichIt.parentElement

if (whichIt == null) { return true}

}

whichIt.style.pixelLeft = whichIt.offsetLeft

whichIt.style.pixelTop = whichIt.offsetTop

currentX = (event.clientX + document.body.scrollLeft)

currentY = (event.clientY + document.body.scrollTop)

} else {

window.captureEvents(Event.MOUSEMOVE)

if(checkFocus (e.pageX,e.pageY)) {

whichIt = document.floater

StalkerTouchedX = e.pageX-document.floater.pageX

StalkerTouchedY = e.pageY-document.floater.pageY

}

}

return true

}

function moveIt(e) {

if (whichIt == null) { return false}

if(IE) {

newX = (event.clientX + document.body.scrollLeft)

newY = (event.clientY + document.body.scrollTop)

distanceX = (newX - currentX)distanceY = (newY - currentY)

currentX = newXcurrentY = newY

whichIt.style.pixelLeft += distanceX

whichIt.style.pixelTop += distanceY

if(whichIt.style.pixelTop <document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop

if(whichIt.style.pixelLeft <document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft

if(whichIt.style.pixelLeft >document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20

if(whichIt.style.pixelTop >document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5

event.returnValue = false

} else {

whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY)

if(whichIt.left <0+self.pageXOffset) whichIt.left = 0+self.pageXOffset

if(whichIt.top <0+self.pageYOffset) whichIt.top = 0+self.pageYOffset

if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17

if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17

return false

}

return false

}

function dropIt() {

whichIt = null

if(NS) window.releaseEvents (Event.MOUSEMOVE)

return true

}

<!-- DRAG DROP CODE -->

if(NS) {

window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN)

window.onmousedown = grabIt

window.onmousemove = moveIt

window.onmouseup = dropIt

}

if(IE) {

document.onmousedown = grabIt

document.onmousemove = moveIt

document.onmouseup = dropIt

}

if(NS || IE) action = window.setInterval("heartBeat()",1)

</script>

<p><b>题库 </b></p>

<p>请在右边的搜索框中查找在此页面查找<br>

<br>

"馒头是谁发明的?","诸葛亮",<br>

"“蚕蚁”是蚂蚁还是蚕?","蚕",<br>

"古诗的体制称为“风雅颂”,其中“颂”是指:","宗庙乐歌",<br>

" 目前,唯有哪个金融机构可在县一级的地方设立分支机构?","中国农业银行",<br>

"东汉末年我国的一位杰出的医学家是:","华佗",<br>

"离地面越高空气越稀薄是因为:","空气受到地球引力的影响",<br>

</P>

</body>

</>


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