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标题: 为动态生成html元素增加事件处理 [打印本页]

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作者: songlai    时间: 2007-11-23 23:56
标题: 为动态生成html元素增加事件处理
Adding OnClick property to dynamicly genertated html element

function klik(){
alert("ppp");
}

function addNewImg(newImageId){
newImg = document.createelement('img');
newImg.id = "image"+newImageId;
newImg = document.getElementById("divimage1").appendChild(newImg);
newImg.onclick=klik
}

it works. The new image is created and after clicking on it "ppp" is alerted.

but when I use this:

function klik(ff){
alert(ff);
}

function addNewImg(newImageId){
newImg = document.createelement('img');
newImg.id = "image"+newImageId;
newImg = document.getElementById("divimage1").appendChild(newImg);
newImg.onclick=klik("ppp");
}

"ppp" is alerted in the moment of executing the statement newImg.onclick=klik("ppp"); and when clicking on the generated image nothing happens, even Javascript Console of Firefox stays blind.

function addNewImg(newImageId){
newImg = document.createelement('img');
newImg.id = "image"+newImageId;
newImg = document.getElementById("divimage1").appendChild(newImg);
var onC='ppEdit("image'+newImageId+'","image")';
document.getElementById("image"+newImageId).onclick=new Function(onC);
}

it works

maybe an object detection be great to add too
why?
So browsers that understand document.getElementById,
document.createelement execute the code.

function addNewImg(newImageId){
//object detection check
if (!document.getElementById &&!document.createelement){return;}
newImg = document.createelement('img');
newImg.id = "image"+newImageId;
newImg = document.getElementById("divimage1").appendChild(newImg);
var onC='ppEdit("image'+newImageId+'","image")';
document.getElementById("image"+newImageId).onclick=new Function(onC);
}

alternative solution:
if (!document.getElementById) {return;}
document.getElementById("image"+newImageId).onclick=function(){
ppEdit(this.id, "image");
}


来源于北京教育招生网

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