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有人可以帮助我理解以下链接中的过程,尤其是 onClick 中的部分:

<a href="http://www.example.com/files/download/files.php?file=my_file.doc" onClick="_gaq.push(['_trackEvent', 'Downloads', 'DOC', this.href.substr(23)]); fn12_reminder(this,''); return false;" rel="nofollow">

我知道这是简单的 GA 甚至跟踪过程,但我无法理解的是最后一部分this.href.substr(23)我无法弄清楚这在整个过程中实际上做了什么?

标头中加载的 js 脚本具有以下性质(我将其完整发布,以便有经验的人可以发现连接,如果存在的话):

var functions = true;
function fn12_custom_display_notice(theNotice,theClass){
    if(theClass!=''){
        jQuery("#user-notice").removeClass();
        jQuery("#user-notice").addClass(theClass);
        }
        jQuery("#user-notice").html(theNotice).animate({width:'toggle'},250).delay(3000).animate({width:'toggle'},250);
        }
function fn12_custom_display_reminder(theHTML,theDownloadLink){if(typeof jQuery.ui!='undefined'){$("#dialog").attr("title","Please help spread the word").html(theHTML);$("#dialog").dialog({modal:true,width:375,buttons:{"Continue to Download":function(){$(this).dialog("close");window.location=theDownloadLink;}}});}else{window.location=theDownloadLink;}}
function fn12_custom_reminder(aelem,topic){theLink=$(aelem).attr("href");$.ajax({type:"POST",url:"/db/ajax.php",data:"action=reminder&thepath="+theLink+"&topic="+topic,dataType:"json",error:function(){window.location=theLink;},success:function(msg){if(msg.status==1)fn12_custom_display_reminder(msg.html,theLink);else{fn12_custom_display_notice(msg.message,"error");}}});}
function fn12_custom_gplus_callback(theObject){if(theObject.state=='on'){fn12_custom_display_notice("Big thanks!!!",'success');}}

/* jquery_cookie.js Copyright (c) 2006 Klaus Hartl (stilbuero.de), Dual licensed under the MIT and GPL licenses */
jQuery.cookie=function(name,value,options){if(typeof value!='undefined'||(name&&typeof name!='string')){if(typeof name=='string'){options=options||{};if(value===null){value='';options.expires=-1;}
var expires='';if(options.expires&&(typeof options.expires=='number'||options.expires.toUTCString)){var date;if(typeof options.expires=='number'){date=new Date();date.setTime(date.getTime()+(options.expires*24*60*60*1000));}else{date=options.expires;}
expires='; expires='+date.toUTCString();}
var path=options.path?'; path='+(options.path):'';var domain=options.domain?'; domain='+(options.domain):'';var secure=options.secure?'; secure':'';document.cookie=name+'='+encodeURIComponent(value)+expires+path+domain+secure;}else{for(var n in name){jQuery.cookie(n,name[n],value||options);}}}else{var returnValue={};if(document.cookie){var cookies=document.cookie.split(';');for(var i=0;i<cookies.length;i++){var cookie=jQuery.trim(cookies[i]);if(!name){var nameLength=cookie.indexOf('=');returnValue[cookie.substr(0,nameLength)]=decodeURIComponent(cookie.substr(nameLength+1));}else if(cookie.substr(0,name.length+1)==(name+'=')){returnValue=decodeURIComponent(cookie.substr(name.length+1));break;}}}
return returnValue;}};

任何帮助都会受到高度评价

4

1 回答 1

1

在您的示例中,this.href.substr(23)等于files/download/files.php?file=my_file.doc,它只是与a元素关联的 url。

  • this指的是当前对象,a元素。
  • href指元素的属性。
  • substr(23)采用从第 23 个字符开始的子字符串,以剥离协议和域名。
于 2013-02-12T14:03:40.190 回答