JS中document对象详解
document 文挡对象 - JavaScript脚本语言描述
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注:页面上元素name属性和JavaScript引用的名称必须一致包括大小写
否则会提示你一个错误信息 "引用的元素为空或者不是对象"
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对象属性
document.title //设置文档标题等价于HTML的
标签<BR>document.bgColor //设置页面背景色<BR>document.fgColor //设置前景色(文本颜色)<BR>document.linkColor //未点击过的链接颜色<BR>document.alinkColor //激活链接(焦点在此链接上)的颜色<BR>document.vlinkColor //已点击过的链接颜色<BR>document.URL //设置URL属性从而在同一窗口打开另一网页<BR>document.fileCreatedDate //文件建立日期，只读属性<BR>document.fileModifiedDate //文件修改日期，只读属性<BR>document.fileSize //文件大小，只读属性<BR>document.cookie //设置和读出cookie<BR>document.charset //设置字符集 简体中文:gb2312<BR>---------------------------------------------------------------------<BR>对象方法<BR>document.write() //动态向页面写入内容<BR>document.createElement(Tag) //创建一个html标签对象<BR>document.getElementById(ID) //获得指定ID值的对象<BR>document.getElementsByName(Name) //获得指定Name值的对象<BR>---------------------------------------------------------------------</DIV>
<DIV>images集合(页面中的图象)</DIV>
<DIV>a)通过集合引用<BR>document.images //对应页面上的<img>标签<BR>document.images.length //对应页面上<img>标签的个数<BR>document.images[0] //第1个<img>标签 <BR>document.images[i] //第i-1个<img>标签</DIV>
<DIV>b)通过nane属性直接引用<BR><img name="oImage"><BR>document.images.oImage //document.images.name属性</DIV>
<DIV>c)引用图片的src属性<BR>document.images.oImage.src //document.images.name属性.src</DIV>
<DIV>d)创建一个图象<BR>var oImage<BR>oImage = new Image()<BR>document.images.oImage.src="/1.jpg"<BR>同时在页面上建立一个<img>标签与之对应就可以显示</DIV>
<DIV><html><BR><img name=oImage><BR><script language="javascript"><BR> var oImage<BR> oImage = new Image()<BR> document.images.oImage.src="/1.jpg"<BR></script><BR></html></DIV>
<DIV>----------------------------------------------------------------------</DIV>
<DIV>forms集合(页面中的表单)</DIV>
<DIV>a)通过集合引用<BR>document.forms //对应页面上的<form>标签<BR>document.forms.length //对应页面上<form>标签的个数<BR>document.forms[0] //第1个<form>标签<BR>document.forms[i] //第i-1个<form>标签<BR>document.forms[i].length //第i-1个<form>中的控件数<BR>document.forms[i].elements[j] //第i-1个<form>中第j-1个控件</DIV>
<DIV>b)通过标签name属性直接引用<BR><form name="Myform"><input name="myctrl"></form><BR>document.Myform.myctrl //document.表单名.控件名</DIV>
<DIV>-----------------------------------------------------------------------<BR><html><BR><!--Text控件相关Script--><BR><form name="Myform"><BR><input type="text" name="oText"><BR><input type="password" name="oPswd"><BR><form><BR><script language="javascript"><BR>//获取文本密码框的值<BR>document.write(document.Myform.oText.value)<BR>document.write(document.Myform.oPswd.value)<BR></script><BR></html><BR>-----------------------------------------------------------------------<BR><html><BR><!--Select控件相关Script--><BR><form name="Myform"><BR><select name="oSelect"><BR><option value="1">1</option><BR><option value="2">2</option><BR><option value="3">3</option><BR></select><BR></form></DIV>
<DIV><script language="javascript"><BR> //遍历select控件的option项<BR> var length<BR> length=document.Myform.oSelect.length<BR> for(i=0;i<length;i++)<BR> document.write(document.Myform.oSelect[i].value)<BR></script></DIV>
<DIV><script language="javascript"><BR> //遍历option项并且判断某个option是否被选中<BR> for(i=0;i<document.Myform.oSelect.length;i++){<BR> if(document.Myform.oSelect[i].selected!=true)<BR> document.write(document.Myform.oSelect[i].value)<BR> else<BR> document.write("<font color=red>"+document.Myform.oSelect[i].value+"</font>") <BR> }<BR></script></DIV>
<DIV><script language="javascript"><BR> //根据SelectedIndex打印出选中的option<BR> //(0到document.Myform.oSelect.length-1)<BR> i=document.Myform.oSelect.selectedIndex<BR> document.write(document.Myform.oSelect[i].value)<BR></script></DIV>
<DIV><script language="javascript"><BR> //动态增加select控件的option项<BR> var oOption = document.createElement("OPTION");<BR> oOption.text="4";<BR> oOption.value="4";<BR> document.Myform.oSelect.add(oOption);<BR></script><BR><html><BR>-----------------------------------------------------------------------<BR><Div id="oDiv">Text</Div><BR>document.all.oDiv //引用图层oDiv<BR>document.all.oDiv.style <BR>document.all.oDiv.style.display="" //图层设置为可视<BR>document.all.oDiv.style.display="none" //图层设置为隐藏<BR>/*document.all表示document中所有对象的集合<BR>只有ie支持此属性，因此也用来判断浏览器的种类*/<BR> <BR></DIV> </div>
<!-- <div class="Blog_con3_1">管理员在2009年8月13日编辑了该文章文章。</div> -->
<div class="Blog_con2_1 Blog_con3_2">
<div>
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<div class="bdsharebuttonbox"><A class=bds_more href="#" data-cmd="more"></A><A class=bds_qzone title=分享到QQ空间 href="#" data-cmd="qzone"></A><A class=bds_tsina title=分享到新浪微博 href="#" data-cmd="tsina"></A><A class=bds_tqq title=分享到腾讯微博 href="#" data-cmd="tqq"></A><A class=bds_renren title=分享到人人网 href="#" data-cmd="renren"></A><A class=bds_weixin title=分享到微信 href="#" data-cmd="weixin"></A></div>
<script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script>
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</div>
<div class="Blog_con3_3">
<div><span id='digg_num'>0</span><a href="javascript:void(0)" id='digg' bid='1997332' url='/blog/digg.html' ></a></div>
<p>上一篇：<a href="/uid-9789791-id-1997330.html">tcl 的图片显示js</a></p>
<p>下一篇：<a href="/uid-9789791-id-1997333.html">open 动态修改img的onclick事件</a></p>
</div>
</div>
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<div class="Blog_con3_4 Blog_con3_5">
<div class="Blog_tit2 Blog_tit7">热门推荐</div>
<ul>
<li><a href="" title="" target='blank' ></a></li>
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</div>
<div class="Blog_right1_7" id='replyList'>
<div class="Blog_tit3">给主人留下些什么吧！~~</div>
<!--暂无内容-->
<!-- 评论分页-->
<div class="Blog_right1_6 Blog_right1_12">
</div>
<!-- 评论分页-->
<div class="Blog_right1_10" style="display:none">
<div class="Blog_tit3">评论热议</div>
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<div class="Blog_right1_8">
<div class="nologin_con1"> 请登录后评论。
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</div>
</div>
</div>
<div style="text-align:center;margin-top:10px;">
<script type="text/javascript" smua="d=p&s=b&u=u3118759&w=960&h=90" src="//www.nkscdn.com/smu0/o.js"></script>
</div>
</div>
</div>
</div>
<input type='hidden' id='report_url' value='/blog/ViewReport.html' />
<script type="text/javascript">
//测试字符串的长度 一个汉字算2个字节
function mb_strlen(str)
{
var len=str.length;
var totalCount=0;
for(var i=0;i<len;i++)
{
var c = str.charCodeAt(i);
if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {
totalCount++;
}else{
totalCount+=2;
}
}
return totalCount;
}
/*
var Util = {};
Util.calWbText = function (text, max){
if(max === undefined)
max = 500;
var cLen=0;
var matcher = text.match(/[^\x00-\xff]/g),
wlen = (matcher && matcher.length) || 0;
//匹配url链接正则 http://***
var pattern = /http:\/\/([\w-]+\.)+[\w-]+(\/*[\w-\.\/\?%&=][^\s^\u4e00-\u9fa5]*)?/gi;
//匹配的数据存入数组
var arrPt = new Array();
var i = 0;
while((result = pattern.exec(text)) != null){
arrPt[i] = result[0];
i++;
}
//替换掉原文本中的链接
for(var j = 0;j<arrPt.length;j++){
text = text.replace(arrPt[j],"");
}
//减掉链接所占的长度
return Math.floor((max*2 - text.length - wlen)/2 - 12*i);
};
*/
var allowComment = '0';
//举报弹出层
function showJuBao(url, cid){
$.cover(false);
asyncbox.open({
id : 'report_thickbox',
url : url,
title : '举报违规',
width : 378,
height : 240,
scroll : 'no',
data : {
'cid' : cid,
'idtype' : 2 ,
'blogurl' : window.location.href
},
callback : function(action){
if(action == 'close'){
$.cover(false);
}
}
});
}
$(function(){
//创建管理员删除的弹出层
$('#admin_article_del').click(function(){
$.cover(false);
asyncbox.open({
id : 'class_thickbox',
html : '<div class="HT_layer3_1"><ul><li class="HT_li1">操作原因：<select class="HT_sel7" id="del_type" name="del_type"><option value="广告文章">广告文章</option><option value="违规内容">违规内容</option><option value="标题不明">标题不明</option><option value="文不对题">文不对题</option></select></li><li class="HT_li1" ><input class="HT_btn4" id="admin_delete" type="button" /></li></ul></div>',
title : '选择类型',
width : 300,
height : 150,
scroll : 'no',
callback : function(action){
if(action == 'close'){
$.cover(false);
}
}
});
});
$('#admin_delete').live('click' , function(){
///blog/logicdel/id/3480184/url/%252Fblog%252Findex.html.html
var type = $('#del_type').val();
var url = '/blog/logicdel/id/1997332/url/%252Fuid%252F9789791.html.html';
window.location.href= url + '?type=' + type;
});
//顶 js中暂未添加&过滤
$('#digg').live('click' , function(){
if(isOnLine == '' )
{
//showErrorMsg('登录之后才能进行此操作' , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
return false;
}
var bid = $('#digg').attr('bid');
var url = $('#digg').attr('url');
var digg_str = $.cookie('digg_id');
if(digg_str != null)
{
var arr= new Array(); //定义一数组
arr = digg_str.split(","); //字符分割
for( i=0 ; i < arr.length ; i++ )
{
if(bid == arr[i])
{
showErrorMsg('已经赞过该文章', '消息提示');
return false;
}
}
}
$.ajax({
type:"POST",
url:url,
data: {
'bid' : bid
},
dataType: 'json',
success:function(msg){
if(msg.error == 0)
{
var num = parseInt($('#digg_num').html(),10);
num += 1;
$('#digg_num').html(num);
$('#digg').die();
if(digg_str == null)
{
$.cookie('digg_id', bid, {expires: 30 , path: '/'});
}
else
{
$.cookie('digg_id', digg_str + ',' + bid, {expires: 30 , path: '/'});
}
showSucceedMsg('谢谢' , '消息提示');
}
else if(msg.error == 1)
{
//showErrorMsg(msg.error_content , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
}
else if(msg.error == 2)
{
showErrorMsg(msg.error_content , '消息提示');
}
}
});
});
//举报弹出层
/*$('.box_report').live('click' , function(){
if(isOnLine == '' )
{
//showErrorMsg('登录之后才能进行此操作' , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
return false;
}
var url = $('#report_url').val();
var cid = $(this).attr('cid');
$.cover(false);
asyncbox.open({
id : 'report_thickbox',
url : url,
title : '举报违规',
width : 378,
height : 240,
scroll : 'no',
data : {
'cid' : cid,
'idtype' : 2
},
callback : function(action){
if(action == 'close'){
$.cover(false);
}
}
});
});*/
//评论相关代码
//点击回复显示评论框
$('.Blog_a10').live('click' , function(){
if(isOnLine == '' )
{
//showErrorMsg('登录之后才能进行此操作' , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
return false;
}
if(allowComment == 1)
{
showErrorMsg('该博文不允许评论' , '消息提示');
return false;
}
var tid = $(this).attr('toid');//留言作者id
var bid = $(this).attr('bid');//blogid
var cid = $(this).attr('cid');//留言id
var tname = $(this).attr('tname');
var tpl = '<div class="Blog_right1_9">';
tpl += '<div class="div2">';
tpl += '<textarea name="" cols="" rows="" class="Blog_ar1_1" id="rmsg">文明上网，理性发言...</textarea>';
tpl += '</div>';
tpl += '<div class="div3">';
tpl += '<div class="div3_2"><a href="javascript:void(0);" class="Blog_a11" id="quota_sbumit" url="/Comment/PostComment.html" tid="'+tid+'" bid="'+bid+'" cid="'+cid+'" tname="'+tname+'" ></a><a href="javascript:void(0)" id="qx_comment" class="Blog_a12"></a></div>';
tpl += '<div class="div3_1"><a href="javascript:void(0);" id="mface"><span></span>表情</a></div>';
tpl += '<div class="clear"></div>';
tpl += '</div>';
tpl += '</div>';
$('.z_move_comment').html('');
$(this).parents('.Blog_right1_8').find('.z_move_comment').html(tpl).show();
});
//引用的评论提交
$('#quota_sbumit').live('click' , function(){
if(isOnLine == '' )
{
//showErrorMsg('登录之后才能进行此操作' , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
return false;
}
var bid = $(this).attr('bid');
var tid = $(this).attr('tid');//被引用人的id
var qid = $(this).attr('cid');//引用的id
var url = $(this).attr('url');
var text = $('#rmsg').val();
var tname = $(this).attr('tname');
if(text == '' || text=='文明上网，理性发言...')
{
showErrorMsg('评论内容不能为空！' , '消息提示');
return false;
}
else
{
if(mb_strlen(text) > 1000){
showErrorMsg('评论内容不能超过500个汉字' , '消息提示');
return false;
}
}
$.ajax({
type: "post",
url: url ,
data: {'bid': bid , 'to' : tid , 'qid' : qid , 'text': text , 'tname' : tname },
dataType: 'json',
success: function(data){
if(data.code == 1){
var tpl = '<div class="Blog_right1_8">';
tpl+= '<div class="Blog_right_img1"><a href="' +data.info.url+ '" >' + data.info.header + '</a></div>';
tpl+= '<div class="Blog_right_font1">';
tpl+= '<p class="Blog_p5"><span><a href="' +data.info.url+ '" >' + data.info.username + '</a></span>' + data.info.dateline + '</p>';
tpl+= '<p class="Blog_p7"><a href="' + data.info.quota.url + '">' + data.info.quota.username + '</a>：'+ data.info.quota.content + '</p>';
tpl+= '<p class="Blog_p8">' + data.info.content + '</p><span class="span_text1"><a href="javascript:void(0);" class="Blog_a10" toid=' + data.info.fuid + ' bid=' + data.info.bid + ' cid=' + data.info.cid + ' tname = ' + data.info.username + ' >回复</a> | <a class="comment_del_mark" style="cursor:pointer" url="' + data.info.delurl + '" >删除</a> | <a href="javascript:showJuBao(\'/blog/ViewReport.html\','+data.info.cid+')" class="box_report" cid="' + data.info.cid + '" >举报</a></span></div>';
tpl+= '<div class="z_move_comment" style="display:none"></div>';
tpl+= '<div class="Blog_line1"></div></div>';
$('#replyList .Blog_right1_8:first').before(tpl);
$('.z_move_comment').html('').hide();
}
else if(data.code == -1){
//showErrorMsg(data.info , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
}
},
error: function(){//请求出错处理
}
});
});
//底部发表评论
$('#submitmsg').click(function(){
if(allowComment == 1)
{
showErrorMsg('该博文不允许评论' , '消息提示');
return false;
}
var bid = $(this).attr('bid');
var toid = $(this).attr('toid');
var text = $('#reply').val();
var url = $(this).attr('url');
if(text == '' || text=='文明上网，理性发言...')
{
showErrorMsg('评论内容不能为空！' , '消息提示');
return false;
}
else
{
if(mb_strlen(text) > 1000){
showErrorMsg('评论内容不能超过500个汉字' , '消息提示');
return false;
}
}
$.ajax({
type: "post",
url: url ,
data: {'bid': bid , 'to' : toid ,'text': text},
dataType: 'json',
success: function(data){
if(data.code == 1)
{
var tpl = '<div class="Blog_right1_8">';
tpl += '<div class="Blog_right_img1"><a href="' +data.info.url+ '" >' + data.info.header + '</a></div>';
tpl += '<div class="Blog_right_font1">';
tpl += '<p class="Blog_p5"><span><a href="' +data.info.url+ '" >' + data.info.username + '</a></span>' + data.info.dateline + '</p>';
tpl += '<p class="Blog_p6">' + data.info.content + '</p>';
tpl += '<div class="div1"><a href="javascript:void(0);" class="Blog_a10" toid=' + data.info.fuid + ' bid=' + data.info.bid + ' cid=' + data.info.cid + '>回复</a> | <a class="comment_del_mark" style="cursor:pointer" url="' + data.info.delurl + '">删除</a> | <a href="javascript:showJuBao(\'/blog/ViewReport.html\','+data.info.cid+')" class="box_report" cid="' + data.info.cid + '">举报</a></div>';
tpl += '<div class="z_move_comment" style="display:none"></div>';
tpl += '</div><div class="Blog_line1"></div></div>';
$('.Blog_tit3:first').after(tpl);
$('#reply').val('文明上网，理性发言...');
}
else if(data.code == -1)
{
showErrorMsg(data.info , '消息提示');
}
},
error: function(){//请求出错处理
}
});
});
//底部评论重置
$('#reset_comment').click(function(){
$('#reply').val('文明上网，理性发言...');
});
//取消回复
$('#qx_comment').live('click' , function(){
$('.z_move_comment').html('').hide();
});
$('#rmsg, #reply').live({
focus:function(){
if($(this).val() == '文明上网，理性发言...'){
$(this).val('');
}
},
blur:function(){
if($(this).val() == ''){
$(this).val('文明上网，理性发言...');
}
}
});
//删除留言确认
$('.comment_del_mark').live('click' , function(){
var url = $(this).attr('url');
asyncbox.confirm('删除留言','确认', function(action){
if(action == 'ok')
{
location.href = url;
}
});
});
//删除时间确认
$('.del_article_id').click(function(){
var delurl = $(this).attr('delurl');
asyncbox.confirm('删除文章','确认', function(action){
if(action == 'ok')
{
location.href = delurl;
}
});
});
/*
//字数限制
$('#rmsg, #reply').live('keyup', function(){
var id = $(this).attr('id');
var left = Util.calWbText($(this).val(), 500);
var eid = '#errmsg';
if(id == 'reply') eid = '#rerrmsg';
if (left >= 0)
$(eid).html('您还可以输入<span>' + left + '</span>字');
else
$(eid).html('<font color="red">您已超出<span>' + Math.abs(left) + '</span>字 </font>');
});
*/
//加载表情
$('#face').qqFace({id : 'facebox1', assign : 'reply', path : '/image/qqface/'});
$('#mface').qqFace({id : 'facebox', assign : 'rmsg', path:'/image/qqface/'});
/*
$('#class_one_id').change(function(){
alert(123213);
var id = parseInt($(this).val() , 10);
if(id == 0) return false;
$('.hidden_son_class span').each(function( index , dom ){
if( dom.attr('cid') == id )
{
}
});
});
*/
//转载文章
var turn_url = "/blog/viewClassPart.html";
$('#repost_bar').click(function(){
if(isOnLine == '' )
{
//showErrorMsg('登录之后才能进行此操作' , '消息提示');
showErrorMsg('操作失败,您需要先登录!', '消息提示', 'http://account.chinaunix.net/login');
return false;
}
var id = $(this).attr('bid');
asyncbox.open({
id : 'turn_class_thickbox',
url : turn_url,
title : '转载文章',
width : 330,
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