JavaScript關於attachEvent和addEventListener的使用方法

JavaScript關於attachEvent和addEventListener的使用方法

 

attachEvent方法，為某一事件附加其它的處理事件。（不支援Mozilla系列） addEventListener方法 用於 Mozilla系列舉例: Java代碼 document.getElementById("btn").onclick = method1;   document.getElementById("btn").onclick = method2;   document.getElementById("btn").onclick = method3;  document.getElementById("btn").onclick = method1;document.getElementById("btn").onclick = method2;document.getElementById("btn").onclick = method3;如果這樣寫,那麼將會只有medhot3被執行 寫成這樣： Java代碼:var btn1Obj = document.getElementById("btn1");    //object.attachEvent(event,function);   btn1Obj.attachEvent("onclick",method1);   btn1Obj.attachEvent("onclick",method2);   btn1Obj.attachEvent("onclick",method3);  var btn1Obj = document.getElementById("btn1"); //object.attachEvent(event,function);btn1Obj.attachEvent("onclick",method1);btn1Obj.attachEvent("onclick",method2);btn1Obj.attachEvent("onclick",method3);執行順序為method3->method2->method1 如果是Mozilla系列，並不支援該方法，需要用到addEventListener Java代碼:var btn1Obj = document.getElementById("btn1");   //element.addEventListener(type,listener,useCapture);   btn1Obj.addEventListener("click",method1,false);   btn1Obj.addEventListener("click",method2,false);   btn1Obj.addEventListener("click",method3,false);  var btn1Obj = document.getElementById("btn1");//element.addEventListener(type,listener,useCapture);btn1Obj.addEventListener("click",method1,false);btn1Obj.addEventListener("click",method2,false);btn1Obj.addEventListener("click",method3,false);執行順序為method1->method2->method3 使用執行個體： 1。 Java代碼:var el = EDITFORM_DOCUMENT.body;    //先取得對象，EDITFORM_DOCUMENT實為一個iframe   if (el.addEventListener)...{    el.addEventListener('click', KindDisableMenu, false);   } else if (el.attachEvent)...{    el.attachEvent('onclick', KindDisableMenu);   }  var el = EDITFORM_DOCUMENT.body; //先取得對象，EDITFORM_DOCUMENT實為一個iframeif (el.addEventListener)...{ el.addEventListener('click', KindDisableMenu, false);} else if (el.attachEvent)...{ el.attachEvent('onclick', KindDisableMenu);}2。 Java代碼:if (window.addEventListener) ...{    window.addEventListener('load', _uCO, false);   } else if (window.attachEvent) ...{    window.attachEvent('onload', _uCO);   }