事件處理程序
阿新 • • 發佈:2017-09-12
log 瀏覽器 meta var onclick 處理 tlist button als
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>DOM0級DOM2級</title> </head> <body> <input id="btn1" type="button" value="click1" onclick="show()"> <input id="btn2" type="button" value="click2"> <input id="btn3" type="button" value="click3"> <script> functionshow() { alert("btn1"); } //DOM0級 var btn2 = document.getElementById("btn2"); btn2.onclick = function () { alert("DOM0級btn2"); }; //DOM2級 function show2() { alert("DOM2級btn3"); } var btn3 = document.getElementById("btn3"); // btn3.addEventListener("click",show2,false);// btn3.removeEventListener("click",show2,false); //ie事件處理程序 // btn3.attachEvent("onclick",show2); // btn3.detachEvent("onclick",show2); //跨瀏覽器事件處理程序 //能力檢測 var eventUtil = { //添加具柄; addHandler:function (element,type,handler) { if (element.addEventListener){ element.addEventListener(type,handler,false); }else if(element.attachEvent){ element.attachEvent("on"+type,handler); }else { element["on"+type]=handler; } }, //刪除具柄; removeHandler:function (element,type,handler) { if (element.removeEventListener){ element.removeEventListener(type,handler,false); }else if(element.detachEvent){ element.detachEvent("on"+type,handler); }else { element["on"+type]=null; } } }; eventUtil.addHandler(btn3,"click",show2); eventUtil.removeHandler(btn3,"click",show2); </script> </body> </html>
事件處理程序