onload 사용자 정의 함수의 6가지 쓰기
1944 단어 onLoad
function addfunction(){
...
}
<body onload="addfunction()">
두 번째 방법:
window.onload = addfunction;
function addfunction(){
...
}
세 번째 방법:
window.onload = function(){
firstFunction();
secondFunction();
}
네 번째 방법:
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function() {
oldonload();
func();
}
}
}
addLoadEvent(addfunction);
다섯 번째 방법:function addEvent(obj,EventName,callBack){//
if(obj.addEventListener){
obj.addEventListener(EventName,callBack,false);
}else if(obj.attachEvent){//IE
obj.attachEvent('on'+EventName,callBack);
}else{
obj["on"+EventName]=callBack;
}
}
function a(){
alert("a");
}
function b(){
alert("b");
}
addEvent(window,"load",a);
addEvent(window,"load",b);
여섯 번째 방법:// Please note: this file contains snippets for comparison
// it is not self-contained or ready-to-use code as such
function addLoadListener(fn)
{
if (typeof window.addEventListener != 'undefined')
{
window.addEventListener('load', fn, false);
}
else if (typeof document.addEventListener != 'undefined')
{
document.addEventListener('load', fn, false);
}
else if (typeof window.attachEvent != 'undefined')
{
window.attachEvent('onload', fn);
}
else
{
var oldfn = window.onload;
if (typeof window.onload != 'function')
{
window.onload = fn;
}
else
{
window.onload = function()
{
oldfn();
fn();
};
}
}
}