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                方法一: ~~~ jQuery.fn.setApDiv=function () { //apDiv浮動層顯示位置居中控制 var wheight=$(window).height(); var wwidth=$(window).width(); var apHeight=wheight-$("#apDiv").height(); var apWidth=wwidth-$("#apDiv").width(); $("#apDiv").css("top",apHeight/2); $("#apDiv").css("left",apWidth/2); } ~~~ 調用方法:$("#apDiv").setApDiv(); 方法二: ~~~ //jQuery 應用擴展 jQuery.extend({ // 設置 apDiv setApDiv:function () { //apDiv浮動層顯示位置居中控制 var wheight=$(window).height(); var wwidth=$(window).width(); var apHeight=wheight-$("#apDiv").height(); var apWidth=wwidth-$("#apDiv").width(); $("#apDiv").css("top",apHeight/2); $("#apDiv").css("left",apWidth/2); } }); ~~~ 調用方法:$.setApDiv(); 總結 一種如$.extend({'aa':function(){}}),這種調用時就是這樣$.aa(),另一種如$.fn.extend({'aa':function(){}}),這種調用時就得這樣,$(this).aa() 方法三: ~~~ <script type="text/javascript"> ?$.xyz = function(num1,num2){ ?var num11=parseInt(num1); var num22=parseInt(num2); ?alert(num1+"+"+num2+"="+(num11+num22)); ?} ?$(function(){ $.xyz("11","44"); }) </script> ~~~
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