滚动经典最新话题[prototype框架]下编写_prototype

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<script> <br><br>var Ticker = Class.create(); <BR>Ticker.prototype = { <BR> initialize: function() { <BR> try{ <BR> this.scrollType = "normal"; <BR> this.m_scroll = $(arguments[0]); <BR> this.m_scroll_1 = $(arguments[1]); <BR> this.m_scroll_2 = $(arguments[2]); <BR> this.m_speed = (arguments[3][0])?arguments[3][0]:3; <BR> this.m_request = (arguments[3][1])?arguments[3][1]:60; <BR> this.m_loop = (arguments[3][2])?arguments[3][2]:0.05; <BR> this.m_url = (arguments[3][3])?arguments[3][3]:'http://bbs.blueidea.com/rss.php?fid=1'; <BR> }catch(e){} <BR> finally{} <BR> Event.observe(this.m_scroll, 'mouseover', this.mouseover.bindAsEventListener(this), false); <BR> Event.observe(this.m_scroll, 'mouseout', this.mouseout.bindAsEventListener(this), false); <BR> new PeriodicalExecuter(this.scroll.bindAsEventListener(this), this.m_loop); <BR> new PeriodicalExecuter(this.load.bindAsEventListener(this), this.m_request); <BR> this.load(); <BR> }, <BR> load:function(){ <BR> var request = new Ajax.Request( <BR> this.m_url, <BR> { <BR> method: 'post', <BR> onSuccess: this.update.bindAsEventListener(this), <BR> onFailure: false, <BR> on304: false <BR> } <BR> ); <BR> }, <BR> update:function(request){ <BR> var items = request.responseXML.getElementsByTagName("item"); <BR> for(var i=0;i<items.length;i++){ <br><br> var title = items[i].childNodes[0].childNodes[0].nodeValue; <BR> var link = items[i].childNodes[1].childNodes[0].nodeValue; <BR> var description = items[i].childNodes[2].childNodes[0].nodeValue; <BR> var author = items[i].childNodes[4].childNodes[0].nodeValue; <BR> this.m_scroll_1.innerHTML += "<span><a href=\""+link+"\" title=\""+author+"： \n"+description+"\">"+i+"："+title+""; <BR> } <BR> this.m_scroll_2.innerHTML = this.m_scroll_1.innerHTML; <BR> }, <BR> scroll:function(event){ <BR> switch(this.scrollType){ <BR> case "slow": <BR> if(this.m_scroll_2.offsetWidth-this.m_scroll.scrollLeft<=0){ <BR> this.m_scroll.scrollLeft -= this.m_scroll_1.offsetWidth; <BR> }else{ <BR> this.m_scroll.scrollLeft++; <BR> } <BR> break; <BR> case "normal": <BR> default: <BR> if(this.m_scroll_2.offsetWidth-this.m_scroll.scrollLeft<=0){ <BR> this.m_scroll.scrollLeft -= this.m_scroll_1.offsetWidth; <BR> }else{ <BR> this.m_scroll.scrollLeft+=3; <BR> } <BR> break; <BR> } <BR> }, <BR> mouseover:function(){ <BR> this.scrollType = 'slow'; <BR> return false; <BR> }, <BR> mouseout:function(){ <BR> this.scrollType = 'normal'; <BR> return false; <BR> } <BR>} <BR>ticker1 = new Ticker("scroll","scrollFrame","scrollFrame2",[3,60,0.05,'http://bbs.blueidea.com/rss.php?fid=1']); <br><br></script>