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url (String) : ÇëÇóµÄHTMLÒ³µÄURLµØÖ·¡£
data (Map) : (¿ÉÑ¡²ÎÊý) ·¢ËÍÖÁ·þÎñÆ÷µÄ key/value Êý¾Ý¡£
callback (Callback) : (¿ÉÑ¡²ÎÊý) ÇëÇóÍê³Éʱ(²»ÐèÒªÊÇsuccessµÄ)µÄ»Øµ÷º¯Êý¡£
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function (responseText, textStatus, XMLHttpRequest){
this;//ÔÚÕâÀïthisÖ¸ÏòµÄÊǵ±Ç°µÄDOM¶ÔÏ󣬼´$(".ajax.load")[0]
//alert(responseText);//ÇëÇ󷵻صÄÄÚÈÝ
//alert(textStatus);//ÇëÇó״̬£ºsuccess£¬error
//alert(XMLHttpRequest);//XMLHttpRequest¶ÔÏó
});
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