Dom动态地增加和删除表格

	function saveInfo()
	{
		var tb = document.getElementById("tb");
		var mytr = document.createElement("tr");
		mytr.align = "center";
		var mytd1 = document.createElement("td");
		var mytd2 = document.createElement("td");
		var mytd3 = document.createElement("td");
		var name = document.createTextNode(document.getElementById("username").value);
		var pwd = document.createTextNode(document.getElementById("userpwd").value);
		
		var mya = document.createElement("a");
		mya.href = "#";
		mya.onclick = delMe;
		var del = document.createTextNode("删除");
		mya.appendChild(del);
		mytd1.appendChild(name);
		mytd2.appendChild(pwd);
		mytd3.appendChild(mya);
		mytr.appendChild(mytd1);
		mytr.appendChild(mytd2);
		mytr.appendChild(mytd3);
		tb.appendChild(mytr);
			
	}
	function delMe()
	{
		var mytr = this.parentNode.parentNode;
		if(confirm("您确定要删除"+mytr.firstChild.firstChild.nodeValue+"吗？"))//获取表格中的值
		{
		//confirm("您确定要删除"+mytr.firstChild.firstChild+"吗？");
			mytr.parentNode.removeChild(mytr);
		}
	}