JavaScript + Ajax 実践サンプル集

AjaxでYouTubeのビデオをスライドで表示

説明コードコメント投稿

このサンプルは、YouTubeのビデオを検索して検索結果をスライドで表示します。スライドは3秒間隔で切り替わります。[1]-[10]の番号をクリックすると手動で切り替えできます。[NEXT]をクリックするとスライドを順番に表示します。

メルマガ登録！ (ドラッグ＆リサイズ可)

苗字
メール

このメルマガを購読すると、新着サンプルの情報を受け取ることができます。「苗字」と「メールアドレス」を入力したら[登録]ボタンをクリックしてください。このウィンドウは、任意の場所に移動したりリサイズすることができます。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Slide YouTube Videos</title>
<style type="text/css">
.contentslide{
border: 10px solid navy;
border-bottom-width: 6px;
padding: 8px;
width: 300px;
height: 100px;
}

.contentslide .contentdiv{
display: none;
}

.pagination{
width: 316px; /* width+(padding*2) =>  300+(8*2)  */
text-align: right;
background-color: navy;
border: 10px solid navy;
border-width: 0 10px; /* Left/right border width of pagination DIV.*/
padding: 0 0 4px 0;
}

* html .pagination{
width: 200px; /*IE5 width*/
width: 216px; /*IE6 width*/
}

.pagination a{
padding: 0 5px;
text-decoration: none; 
color: #2e6ab1;
background-color: white;
}

.pagination a:hover, .pagination a.selected{
color: #000;
background-color: #FEE496;
}

img { border:0}

</style>  
<script type="text/javascript" src="../../MSAjax/MicrosoftAjax.js"></script>
<script type="text/javascript" src="../../WebServices/YouTubeWebService.asmx/js"></script>

//// 以下のコードは編集不要 ////////////////////////
var enablepersist=true;
var slidernodes=new Object();
var csloadedobjects="";

function ContentSlider(sliderid, autorun, customPaginateText, customNextText){
	var slider=document.getElementById(sliderid)
	if (typeof customPaginateText!="undefined" && customPaginateText!="") 
		slider.paginateText=customPaginateText
	if (typeof customNextText!="undefined" && customNextText!="") 
		slider.nextText=customNextText
	slidernodes[sliderid]=[] 
	ContentSlider.loadobjects(csexternalfiles) 
	var alldivs=slider.getElementsByTagName("div")
	for (var i=0; i<alldivs.length; i++){
		if (alldivs[i].className=="contentdiv"){
			slidernodes[sliderid].push(alldivs[i]) 
			if (typeof alldivs[i].getAttribute("rel")=="string") 
				ContentSlider.ajaxpage(alldivs[i].getAttribute("rel"), alldivs[i])
		}
	}
	ContentSlider.buildpagination(sliderid)
	var loadfirstcontent=true
	if (enablepersist && getCookie(sliderid)!=""){ 
		var cookieval=getCookie(sliderid).split(":") 
		if (document.getElementById(cookieval[0])!=null && typeof slidernodes[sliderid][cookieval[1]]!="undefined"){ 
			ContentSlider.turnpage(cookieval[0], parseInt(cookieval[1])) 
			loadfirstcontent=false
		}
	}
	if (loadfirstcontent==true) 
		ContentSlider.turnpage(sliderid, 0)
	if (typeof autorun=="number" && autorun>0) 
		window[sliderid+"timer"]=setTimeout(function(){ContentSlider.autoturnpage(sliderid, autorun)}, autorun)
}

ContentSlider.buildpagination=function(sliderid){
	var slider=document.getElementById(sliderid)
	var paginatediv=document.getElementById("paginate-"+sliderid) 
	var pcontent=""
	for (var i=0; i<slidernodes[sliderid].length; i++) 
		pcontent+='<a href="#" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', '+i+'); return false\">'+(slider.paginateText? slider.paginateText[i] : i+1)+'</a> '
	pcontent+='<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\'))); return false\">'+(slider.nextText || "Next")+'</a>'
	paginatediv.innerHTML=pcontent
	paginatediv.onclick=function(){ 
	if (typeof window[sliderid+"timer"]!="undefined")
		clearTimeout(window[sliderid+"timer"])
	}
}

ContentSlider.turnpage=function(sliderid, thepage){
	var paginatelinks=document.getElementById("paginate-"+sliderid).getElementsByTagName("a") 
	for (var i=0; i<slidernodes[sliderid].length; i++){ 
		paginatelinks[i].className=""
		slidernodes[sliderid][i].style.display="none" 
	}
	paginatelinks[thepage].className="selected" 
	slidernodes[sliderid][thepage].style.display="block"
	
	paginatelinks[paginatelinks.length-1].setAttribute("rel", thenextpage=(thepage<paginatelinks.length-2)? thepage+1 : 0)
	if (enablepersist)
		setCookie(sliderid, sliderid+":"+thepage)
}

ContentSlider.autoturnpage=function(sliderid, autorunperiod){
	var paginatelinks=document.getElementById("paginate-"+sliderid).getElementsByTagName("a") 
	var nextpagenumber=parseInt(paginatelinks[paginatelinks.length-1].getAttribute("rel")) 
	ContentSlider.turnpage(sliderid, nextpagenumber) 
	window[sliderid+"timer"]=setTimeout(function(){ContentSlider.autoturnpage(sliderid, autorunperiod)}, autorunperiod)
}

function getCookie(Name){ 
	var re=new RegExp(Name+"=[^;]+", "i"); 
	if (document.cookie.match(re)) 
		return document.cookie.match(re)[0].split("=")[1] 
	return ""
}

function setCookie(name, value){
	document.cookie = name+"="+value
}

ContentSlider.ajaxpage=function(url, thediv){
	var page_request = false
	var bustcacheparameter=""
	if (window.XMLHttpRequest) // if Mozilla, Safari etc
		page_request = new XMLHttpRequest()
	else if (window.ActiveXObject){ // if IE
		try {
		page_request = new ActiveXObject("Msxml2.XMLHTTP")
		} 
		catch (e){
		try{
		page_request = new ActiveXObject("Microsoft.XMLHTTP")
		}
		catch (e){}
		}
	}
	else
		return false
	thediv.innerHTML=csloadstatustext
	page_request.onreadystatechange=function(){
		ContentSlider.loadpage(page_request, thediv)
	}
	if (csbustcachevar) 
		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
	page_request.open('GET', url+bustcacheparameter, true)
	page_request.send(null)
}

ContentSlider.loadpage=function(page_request, thediv){
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
		thediv.innerHTML=page_request.responseText
}

ContentSlider.loadobjects=function(externalfiles){
	for (var i=0; i<externalfiles.length; i++){
		var file=externalfiles[i]
		var fileref=""
		if (csloadedobjects.indexOf(file)==-1){
			if (file.indexOf(".js")!=-1){ 
				fileref=document.createElement('script')
				fileref.setAttribute("type","text/javascript");
				fileref.setAttribute("src", file);
			}
			else if (file.indexOf(".css")!=-1){
				fileref=document.createElement("link")
				fileref.setAttribute("rel", "stylesheet");
				fileref.setAttribute("type", "text/css");
				fileref.setAttribute("href", file);
			}
		}
		if (fileref!=""){
			document.getElementsByTagName("head").item(0).appendChild(fileref)
			csloadedobjects+=file+" " 
		}
	}
}
</script>

function btnSearch_Click() {
    DoSearch();
}

function DoSearch() {
    var keywordText = $get("txtKeyword").value;
    YouTubeWebService.GetYouTube(keywordText,"1","10","","",onComplete, onError,"YouTube Rest")
}

function onComplete(result, userContext, methodName) {
  if (result == null || result == 'undefined') {
    alert("Not Found!");
    return;
  }
  
  for (var i=0; i<10; i++) {
    $get("slide"+i).innnerHTML = "";
  }

for (i=0; i<result.Videos.length; i++) {
    $get("slide"+i).innerHTML = String.format('<div style="float:left"><a href="{0}" target="_blank"><img src="{1}" border="0" alt="{2}" /></a></div><div style="float:left">{3}</div>',result.Videos[i].OriginalUrl, result.Videos[i].Thumbnail, result.Videos[i].Title, result.Videos[i].Description.substring(0,60));
  } 
  ContentSlider("slider1",3000) 
}

function onError(exception, userContext, methodName) {
  if (exception.get_timedOut()) {
    alert(String.format("Timeout occurred in '{1'} with '{2}'", methodName, userContext));
  }
  else {
    alert(String.format("'{0}' occurred in '{1}' with '{2}'", exception.get_message(), methodName, userContext));
  }  
}

function onKeyPress(e) {
  var evt = new Sys.UI.DomEvent(e);
  if (evt.charCode == Sys.UI.Key.enter) { 
    evt.stopPropagation(); 
		DoSearch();
	}
}
</script>

</head>
<body>

</body>
</html>

このサンプルを編集して試してみる!

jQueryを使い倒せ! jQueryでAjaxを実装するための基礎知識と実践サンプルを一挙公開中...

AjaxでYouTubeのビデオをスライドで表示