JS动态创建元素
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<meta charset="utf-8" />
<script type="text/javascript">
onload = function () {
var btn = document.getElementById('btn');
btn.onclick = function () {
var dv = document.createElement('div');
dv.id = 'dv'
dv.style.width = '300px';
//dv.style.height = '300px'
dv.style.backgroundColor = 'yellow';
document.body.appendChild(dv);
}
var i=0;
var btnAdd = document.getElementById('btnAdd');
btnAdd.onclick = function () {
var input = document.createElement('input');
input.type = 'button';
input.value = 'button' + i;
i++;
var dv = document.getElementById('dv');
dv.appendChild(input);
}
var btnInsertBefore = document.getElementById('btnInsertBefore');
btnInsertBefore.onclick = function () {
var input = document.createElement('input');
input.type = 'button';
input.value = 'button' + i;
i++;
var dv = document.getElementById('dv');
dv.insertBefore(input, dv.firstChild);
}
var btnDelete = document.getElementById('btnDelete');
btnDelete.onclick = function () {
var dv = document.getElementById('dv');
while (dv.firstChild) {
dv.removeChild(dv.firstChild);
}
}
}
</script>
</head>
<body>
<input type="button" id="btn" value="创建一个层" />
<input type="button" id="btnAdd" value="创建一个按钮" />
<input type="button" id="btnInsertBefore" value="插入一个按钮" />
<input type="button" id="btnDelete" value="清空按钮"/>
</body>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<meta charset="utf-8" />
<script type="text/javascript">
onload = function () {
var btn = document.getElementById('btn');
btn.onclick = function () {
var dv = document.createElement('div');
dv.id = 'dv'
dv.style.width = '300px';
//dv.style.height = '300px'
dv.style.backgroundColor = 'yellow';
document.body.appendChild(dv);
}
var i=0;
var btnAdd = document.getElementById('btnAdd');
btnAdd.onclick = function () {
var input = document.createElement('input');
input.type = 'button';
input.value = 'button' + i;
i++;
var dv = document.getElementById('dv');
dv.appendChild(input);
}
var btnInsertBefore = document.getElementById('btnInsertBefore');
btnInsertBefore.onclick = function () {
var input = document.createElement('input');
input.type = 'button';
input.value = 'button' + i;
i++;
var dv = document.getElementById('dv');
dv.insertBefore(input, dv.firstChild);
}
var btnDelete = document.getElementById('btnDelete');
btnDelete.onclick = function () {
var dv = document.getElementById('dv');
while (dv.firstChild) {
dv.removeChild(dv.firstChild);
}
}
}
</script>
</head>
<body>
<input type="button" id="btn" value="创建一个层" />
<input type="button" id="btnAdd" value="创建一个按钮" />
<input type="button" id="btnInsertBefore" value="插入一个按钮" />
<input type="button" id="btnDelete" value="清空按钮"/>
</body>
</html>
