Window. The event IE: there is a window.event object FF: no window.event object. You can pass the event object as an argument to a function. Such as onmousemove = doMouseMove (event) Current mouse coordinates IE: event.x and event.y. FF: event.pagex and event.pagey. General: both have event.clientx and event.clienty properties.

Current mouse coordinates (plus the distance the scroll bar has traveled) IE: event.offsetx and event.offsety. FF: event.layerx and event.layery. Coordinates of x and y of the label: style.posleft and style.postop IE:. FF: no. General: object.offsetleft and object.offsettop.

The height and width of the form IE: the document body. The offsetWidth and document. Body. OffsetHeight. Note: the page must have a body tag. FF: window. InnerWidth and window. InnerHegiht, as well as the document. The documentElement. ClientWidth and document. DocumentElement. ClientHeight. General: the document body. ClientWidth and document. Body. ClientHeight.

Add event IE: element. AttachEvent (” onclick ”, func); . FF: element.addeventlistener (” click ”, func, true). General: element.onclick=func. Although both can use the onclick event, the onclick effect is different from the above two methods. Onclick only executes one procedure, while attachEvent and addEventListener execute a list of procedures, that is, multiple procedures. For example: element. AttachEvent (” onclick ”, func1); Element. AttachEvent (” onclick ”, func2) so that both func1 and func2 are executed.

Custom attributes of the tag IE: if an attribute value is defined for the tag div1, it can be obtained by div1.value and div1[” value ”]. FF: div1.value and div1[” value ”] cannot be used. General: div1.getattribute (” value ”).

Parent, child, and delete nodes IE: parentElement, parement. Children, element.romovenode (true). FF: parentNode, parentNode.childnodes, node. ParentNode. RemoveChild (node).