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Sunday, December 19, 2010



Lướt web thường xuyên, chắc các bạn cũng sẽ không ít lần gặp Slideshow Tab View . Widget này khá đẹp và có thể dùng để trang trí thêm cho blog, 1 blogger Indonesia - Kang Rohman có 1 bài viết hướng dẫn cách tạo widget này. Mời các bạn xem qua bài hướng dẫn đã được mình dịch lại bên dưới .
Để tạo widget, bạn làm theo các bước sau :

  1. Đăng nhập vào Blogger > Layout > Edit HTML (Không cần Mở rộng Mẫu tiện ích)
  2. Thêm đoạn code bên dưới vào ngày trên thẻ ]]></b:skin>

.indentmenu{

font: bold 11px Arial;

width: 100%; /*leave this value as is in most cases*/

}

.indentmenu ul{

margin: 2px;

padding: 0;

float: left;

/* width: 80%; width of menu*/

background: transparent;

}

.indentmenu ul li{

display: inline;

}

.indentmenu ul li a{

float: left;

margin: 2px;

color: #000; /*text color*/

padding: 5px 11px;

text-decoration: none;

border: 1px solid #ccc;

}

.indentmenu ul li a:hover{

background:#ddd;

}

.indentmenu ul li a:visited{

color: white;

}

.indentmenu ul li a.selected{

color: white !important;

padding-top: 6px; /*shift text down 1px*/

padding-bottom: 4px;

border: 1px solid #000000;

background:#000000;

}

.tabcontentstyle{ /*style of tab content container*/

border: 1px solid gray;

width: 450px;

margin-bottom: 1em;

padding: 10px;

}

.tabcontent{

display:none;

}

@media print {

.tabcontent {

display:block !important;

}

}

3>copy toàn bộ đoạn code và dán vào trước thẻ</head>.

<script type='text/javascript'>

//<![CDATA[

//** Tab Content script v2.0- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)

//** Updated Oct 7th, 07 to version 2.0. Contains numerous improvements:

// -Added Auto Mode: Script auto rotates the tabs based on an interval, until a tab is explicitly selected

// -Ability to expand/contract arbitrary DIVs on the page as the tabbed content is expanded/ contracted

// -Ability to dynamically select a tab either based on its position within its peers, or its ID attribute (give the target tab one 1st)

// -Ability to set where the CSS classname "selected" get assigned- either to the target tab's link ("A"), or its parent container

//** Updated Feb 18th, 08 to version 2.1: Adds a "tabinstance.cycleit(dir)" method to cycle forward or backward between tabs dynamically

//** Updated April 8th, 08 to version 2.2: Adds support for expanding a tab using a URL parameter (ie: http://mysite.com/tabcontent.htm?tabinterfaceid=0)

////NO NEED TO EDIT BELOW////////////////////////

function ddtabcontent(tabinterfaceid){

this.tabinterfaceid=tabinterfaceid //ID of Tab Menu main container

this.tabs=document.getElementById(tabinterfaceid).getElementsByTagName("a") //Get all tab links within container

this.enabletabpersistence=true

this.hottabspositions=[] //Array to store position of tabs that have a "rel" attr defined, relative to all tab links, within container

this.currentTabIndex=0 //Index of currently selected hot tab (tab with sub content) within hottabspositions[] array

this.subcontentids=[] //Array to store ids of the sub contents ("rel" attr values)

this.revcontentids=[] //Array to store ids of arbitrary contents to expand/contact as well ("rev" attr values)

this.selectedClassTarget="link" //keyword to indicate which target element to assign "selected" CSS class ("linkparent" or "link")

}

ddtabcontent.getCookie=function(Name){

var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair

if (document.cookie.match(re)) //if cookie found

return document.cookie.match(re)[0].split("=")[1] //return its value

return ""

}

ddtabcontent.setCookie=function(name, value){

document.cookie = name+"="+value+";path=/" //cookie value is domain wide (path=/)

}

ddtabcontent.prototype={

expandit:function(tabid_or_position){ //PUBLIC function to select a tab either by its ID or position(int) within its peers

this.cancelautorun() //stop auto cycling of tabs (if running)

var tabref=""

try{

if (typeof tabid_or_position=="string" && document.getElementById(tabid_or_position).getAttribute("rel")) //if specified tab contains "rel" attr

tabref=document.getElementById(tabid_or_position)

else if (parseInt(tabid_or_position)!=NaN && this.tabs[tabid_or_position].getAttribute("rel")) //if specified tab contains "rel" attr

tabref=this.tabs[tabid_or_position]

}

catch(err){alert("Invalid Tab ID or position entered!")}

if (tabref!="") //if a valid tab is found based on function parameter

this.expandtab(tabref) //expand this tab

},

cycleit:function(dir, autorun){ //PUBLIC function to move foward or backwards through each hot tab (tabinstance.cycleit('foward/back') )

if (dir=="next"){

var currentTabIndex=(this.currentTabIndex<this.hottabspositions.length-1)? this.currentTabIndex+1 : 0

}

else if (dir=="prev"){

var currentTabIndex=(this.currentTabIndex>0)? this.currentTabIndex-1 : this.hottabspositions.length-1

}

if (typeof autorun=="undefined") //if cycleit() is being called by user, versus autorun() function

this.cancelautorun() //stop auto cycling of tabs (if running)

this.expandtab(this.tabs[this.hottabspositions[currentTabIndex]])

},

setpersist:function(bool){ //PUBLIC function to toggle persistence feature

this.enabletabpersistence=bool

},

setselectedClassTarget:function(objstr){ //PUBLIC function to set which target element to assign "selected" CSS class ("linkparent" or "link")

this.selectedClassTarget=objstr || "link"

},

getselectedClassTarget:function(tabref){ //Returns target element to assign "selected" CSS class to

return (this.selectedClassTarget==("linkparent".toLowerCase()))? tabref.parentNode : tabref

},

urlparamselect:function(tabinterfaceid){

var result=window.location.search.match(new RegExp(tabinterfaceid+"=(\\d+)", "i")) //check for "?tabinterfaceid=2" in URL

return (result==null)? null : parseInt(RegExp.$1) //returns null or index, where index (int) is the selected tab's index

},

expandtab:function(tabref){

var subcontentid=tabref.getAttribute("rel") //Get id of subcontent to expand

//Get "rev" attr as a string of IDs in the format ",john,george,trey,etc," to easily search through

var associatedrevids=(tabref.getAttribute("rev"))? ","+tabref.getAttribute("rev").replace(/\s+/, "")+"," : ""

this.expandsubcontent(subcontentid)

this.expandrevcontent(associatedrevids)

for (var i=0; i<this.tabs.length; i++){ //Loop through all tabs, and assign only the selected tab the CSS class "selected"

this.getselectedClassTarget(this.tabs[i]).className=(this.tabs[i].getAttribute("rel")==subcontentid)? "selected" : ""

}

if (this.enabletabpersistence) //if persistence enabled, save selected tab position(int) relative to its peers

ddtabcontent.setCookie(this.tabinterfaceid, tabref.tabposition)

this.setcurrenttabindex(tabref.tabposition) //remember position of selected tab within hottabspositions[] array

},

expandsubcontent:function(subcontentid){

for (var i=0; i<this.subcontentids.length; i++){

var subcontent=document.getElementById(this.subcontentids[i]) //cache current subcontent obj (in for loop)

subcontent.style.display=(subcontent.id==subcontentid)? "block" : "none" //"show" or hide sub content based on matching id attr value

}

},

expandrevcontent:function(associatedrevids){

var allrevids=this.revcontentids

for (var i=0; i<allrevids.length; i++){ //Loop through rev attributes for all tabs in this tab interface

//if any values stored within associatedrevids matches one within allrevids, expand that DIV, otherwise, contract it

document.getElementById(allrevids[i]).style.display=(associatedrevids.indexOf(","+allrevids[i]+",")!=-1)? "block" : "none"

}

},

setcurrenttabindex:function(tabposition){ //store current position of tab (within hottabspositions[] array)

for (var i=0; i<this.hottabspositions.length; i++){

if (tabposition==this.hottabspositions[i]){

this.currentTabIndex=i

break

}

}

},

autorun:function(){ //function to auto cycle through and select tabs based on a set interval

this.cycleit('next', true)

},

cancelautorun:function(){

if (typeof this.autoruntimer!="undefined")

clearInterval(this.autoruntimer)

},

init:function(automodeperiod){

var persistedtab=ddtabcontent.getCookie(this.tabinterfaceid) //get position of persisted tab (applicable if persistence is enabled)

var selectedtab=-1 //Currently selected tab index (-1 meaning none)

var selectedtabfromurl=this.urlparamselect(this.tabinterfaceid) //returns null or index from: tabcontent.htm?tabinterfaceid=index

this.automodeperiod=automodeperiod || 0

for (var i=0; i<this.tabs.length; i++){

this.tabs[i].tabposition=i //remember position of tab relative to its peers

if (this.tabs[i].getAttribute("rel")){

var tabinstance=this

this.hottabspositions[this.hottabspositions.length]=i //store position of "hot" tab ("rel" attr defined) relative to its peers

this.subcontentids[this.subcontentids.length]=this.tabs[i].getAttribute("rel") //store id of sub content ("rel" attr value)

this.tabs[i].onclick=function(){

tabinstance.expandtab(this)

tabinstance.cancelautorun() //stop auto cycling of tabs (if running)

return false

}

if (this.tabs[i].getAttribute("rev")){ //if "rev" attr defined, store each value within "rev" as an array element

this.revcontentids=this.revcontentids.concat(this.tabs[i].getAttribute("rev").split(/\s*,\s*/))

}

if (selectedtabfromurl==i || this.enabletabpersistence && selectedtab==-1 && parseInt(persistedtab)==i || !this.enabletabpersistence && selectedtab==-1 && this.getselectedClassTarget(this.tabs[i]).className=="selected"){

selectedtab=i //Selected tab index, if found

}

}

} //END for loop

if (selectedtab!=-1) //if a valid default selected tab index is found

this.expandtab(this.tabs[selectedtab]) //expand selected tab (either from URL parameter, persistent feature, or class="selected" class)

else //if no valid default selected index found

this.expandtab(this.tabs[this.hottabspositions[0]]) //Just select first tab that contains a "rel" attr

if (parseInt(this.automodeperiod)>500 && this.hottabspositions.length>1){

this.autoruntimer=setInterval(function(){tabinstance.autorun()}, this.automodeperiod)

}

} //END int() function

} //END Prototype assignment

//]]>

</script>

4>Save lại template, rồi chuyển sang tab Phần tử trang (Page Elements) . Tạo một widget HTML/Javascript với nội dung như sau :

<div style="float:left;margin:0px 10px 0px 0px;padding:0px;height:350px;">

<div id="pettabs" class="indentmenu">

<ul>

<li><a href="#" class="selected" rel="tab1">1</a></li>

<li><a href="#" rel="tab2">2</a></li>

<li><a href="#" rel="tab3">3</a></li>

<li><a href="#" rel="tab4">4</a></li>

</ul>

<br style="clear: left"/>

</div>

<div style="width:240px;text-align:justify;padding: 5px; margin-bottom:1em">

<div id="tab1" class="tabcontent">

<a href="http://boyprodx.blogspot.com/2009/05/mot-so-hinh-anime-13.html">

<img border="0" style="border-right: 0px; border-top: 0px; border-left: 0px; border-bottom: 0px" alt="obamabush" width="240" src="http://farm4.static.flickr.com/3645/3475475585_9defa0c71a_o.jpg" height="152"/></a>

<p><h3><a href="http://boyprodx.blogspot.com/2009/05/mot-so-hinh-anime-13.html">Mt s hình anime (13)</a></h3></p>

</div>

<div id="tab2" class="tabcontent">

<a href="http://boyprodx.blogspot.com/2009/04/convert-video-truc-tuyen-mien-phi-voi.html">

<img border="0" style="border-right: 0px; border-top: 0px; border-left: 0px; border-bottom: 0px" alt="beyone" width="240" src="http://1.bp.blogspot.com/_K1kfqOH2Mmc/Se8vp2QwrWI/AAAAAAAAA-o/8XAECSV8-ck/s320/logo.jpg" height="152"/></a>

<p><h3><a href="http://boyprodx.blogspot.com/2009/04/convert-video-truc-tuyen-mien-phi-voi.html">Convert video trc tuyến min phí vi CatchVideo</a></h3></p>

Thông thường, các video-clips được đăng ti trên các trang chia s video trc tuyến luôn mang định dng .flv . Định dng này không hp vi nhiu phn mm , thiết b nên vì thế người dùng hay convert (đổi định dng) chúng khi download v.[...]

</div>

<div id="tab3" class="tabcontent">

<a href="http://boyprodx.blogspot.com/2009/04/10-thu-thuat-voi-link-youtube-ma-ban.html">

<img border="0" style="border-right: 0px; border-top: 0px; border-left: 0px; border-bottom: 0px" alt="Guns N 'Roses" width="240" src="http://www.makeuseof.com/wp-content/uploads/2009/04/youtube_logo1.jpg" height="152"/></a>

<p><h3><a href="http://boyprodx.blogspot.com/2009/04/10-thu-thuat-voi-link-youtube-ma-ban.html">10 th thut vi link Youtube mà bn nên biết</a></h3></p>

Youtube là 1 dch v chia s video trc tuyến hàng đầu thế gii vi s lượng video và thành viên rt đông. Để vic xem các clips trên Youtube 1 cách tin li hơn, thì bên dưới đây là 10 th thut v Youtube mà bn nên biết.

[...]

</div>

<div id="tab4" class="tabcontent">

<a href="http://boyprodx.blogspot.com/2009/04/mot-so-hieu-ung-cho-anh-trong-blogger.html">

<img border="0" style="border-right: 0px; border-top: 0px; border-left: 0px; border-bottom: 0px" alt="ipod" width="240" src="http://1.bp.blogspot.com/_K1kfqOH2Mmc/SYV7uK09uFI/AAAAAAAAA2U/L-dEPIROfE0/s320/blogger.png" height="152"/></a>

<p><h3><a href="http://boyprodx.blogspot.com/2009/04/mot-so-hieu-ung-cho-anh-trong-blogger.html">Mt s hiu ng cho nh trong Blogger (cp nht)</a></h3></p>

Như các bn đều biết, để 1 bài đăng tht s hiu qu, gây s chú ý ca người đọc thì hình nh minh ha là không th thiếu. Vì thế, hôm nay mình xin hướng dn cách to 1 s hiu ng l mt cho nh minh ha, góp phn làm sinh động cho bài viết.[...]

</div> </div>

<script type="text/javascript">

var mypets=new ddtabcontent("pettabs")

mypets.setpersist(true)

mypets.setselectedClassTarget("link")

mypets.init(2000)

</script></div>

5> Chỉnh sửa lại nội dung của Bước 4 trên theo ý thích rồi save lại.

- Đầu tiên, bn cn thay nhng vùng text được tô màu đỏ thành nhng ni dung t Blog bn.

- Tiếp đến , bn lưu ý các đon <div style ...> , hiu chnh các yếu t như float ; margin ; padding ; height ; width ; text-align ; padding ; margin-bottom theo ý thích sao cho phù hp.

- Đồng thi, để thêm tab, bn ch vic copy các đon code liên quan đến tab và sa li các s th t ca tab cho phù hp (bn xem kĩ code s hiu được cơ cu).

CHÚC BẠN THÀNH CÔNG!!?

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