JavaScript BOM (one);

One: BOM node:

The node is divided into: element node (label) text node (textbox) attribute node (CSS);

Node Relationship: Parent node pips node sibling nodes; O contains b o is the parent node of B, O and B are under the body, two non-contained, O B is a sibling node;

Node Operation:

1.createElement ("O");   O for the label, create an O tag in body 0; How to use var Newop = document.createelement ("div"); Create a new div tag in the body;

2.o.appendchild (b);   o b is a label; Operation put B in the a tag inside//

Example:

<div id= "BTN1" ></div>

<div id= "BTN2" ></div>

<script>

Before operation: Btn1 and btn2 as sibling nodes

Btn1.appendchild (BTN2);

After operation, BTN1 becomes the parent node of BTN2;

<div id= "BTN1" >

<div id= "BTN2" ></div>

</div>

</script>

3.return false;

return false operation equals break; Meet the condition is to jump out;

JavaScript BOM (one);