在js中使用createElement创建HTML对象和元素 (转)

<script language="javascript">
var o = document.body;
//创建链接
function createA(url,text)
{
var a = document.createElement("a");
a.href = url;
a.innerHTML = text;
a.style.color = "red";
o.appendChild(a);
}
createA("http://www.ffasp.com/","网页教学网");
</script>

<script language="javascript">
var o = document.body;
//创建DIV
function createDIV(text)
{
var div = document.createElement("div");
div.innerHTML = text;
o.appendChild(div);
}
createDIV("网页教学网：http://www.ffasp.com/");    
</script>

<script language="javascript">
var o = document.body;
//创建表单项
function createInput(sType,sValue)
{
var input = document.createElement("input");
input.type = sType;
input.value = sValue;
o.appendChild(input);
}
createInput("button","ooo");
</script>

<script language="javascript">
var o = document.body;
//创建表格
function createTable(w,h,r,c)
{
var table = document.createElement("table");
var tbody = document.createElement("tbody");
table.width = w;
table.height = h;
table.border = 1;    
for(var i=1;i<=r;i++)
{
var tr = document.createElement("tr");
for(var j=1;j<=c;j++)
{
var td = document.createElement("td");
td.innerHTML = i + "" + j;
//td.appendChild(document.createTextNode(i + "" + j));
td.style.color = "#FF0000";
tr.appendChild(td);
}
tbody.appendChild(tr);    
}
table.appendChild(tbody);
o.appendChild(table);
}
createTable(270,270,9,9);
</script>