Javascript tips 1

Windows active element:
document.activeElement

Bind event:
document.captureEvents(Event.KEYDOWN);

Visit window elements:
document.all("txt").focus();
document.all("txt").select();

Window command:
document.execCommand

Context menu event:
document.oncontextmenu

Create element:
document.createElement("SPAN");

Get element by mouse:
document.elementFromPoint(event.x,event.y).tagName=="TD
document.elementFromPoint(event.x,event.y).appendChild(ms)

Window images:
document.images[index]

Bind window event:
document.onmousedown=scrollwindow;

Object bind event:
document.all.xxx.detachEvent('onclick',a);

Get plugins' count:
navigator.plugins

Get variables' type:
typeof($js_libpath) == "undefined"

Dropdown:
select.options[index]
select.options.length