The use of dynamically creating and deleting elements in DOM-based programming_Basic knowledge

< ;script type="text/javascript">
function test(){
//createElement() Create an element with a specified tag name [for example: dynamically create a hyperlink]
var createa=document. createElement("a");
createa.id="a1";
createa.innerText="Connect to Baidu";
createa.href="http://www.baidu.com";
//createa.color="green" ////Add color (don't forget the style attribute, otherwise it will have no effect)
createa.style.color="green"
//Add default location-- body and add child nodes
//document.body.appendChild(createa);
//Place the specified position
>
function test2(){
//Delete node at specified position removeChild()
document.getElementById("div1").removeChild(document.getElementById("a1")); //Duplicate id name js only takes the first
}