聊天室里的滚动条自动向下滚动
今天接到通知说要搞个聊天室，这个东西网上多的不得了，随便一搜到处都是，但是要一个真正适合自己的恐怕还要自己动手了。在用JavaScript调节滚动条自动向下滚动的时候，发现了几个方法，特此记在这里:
首先是doScrooll方法，可以指定滚动的方向。但是不能一下子滚动到最极端。
object .doScroll( [ sScrollAction ] ) sScrollAction Optional. A String that specifies how the object scrolls, using one of the following values.
-
scrollbarDown
- Default. Down scroll arrow is at the specified location.
- Horizontal scroll thumb or box is at the specified location.
- Left scroll arrow is at the specified location.
- Page-down scroll bar shaft is at the specified location.
- Page-left scroll bar shaft is at the specified location.
- Page-right scroll bar shaft is at the specified location.
- Page-up scroll bar shaft is at the specified location.
- Right scroll arrow is at the specified location.
- Up scroll arrow is at the specified location.
- Vertical scroll thumb or box is at the specified location.
scrollbarHThumb
scrollbarLeft
scrollbarPageDown
scrollbarPageLeft
scrollbarPageRight
scrollbarPageUp
scrollbarRight
scrollbarUp
scrollbarVThumb
如果想一下子滚到最下面可以用下面的代码（IE和Firefox都可以用）：
f(divContent.scrollHeight>divContent.offsetHeight)
divContent.scrollTop=divContent.scrollHeight-divContent.offsetHeight;
注：divContent是一个带滚动条的div。 object .doScroll( [ sScrollAction ] ) sScrollAction Optional. A String that specifies how the object scrolls, using one of the following values. scrollbarDown Default. Down scroll arrow is at the specified location. scrollbarHThumb Horizontal scroll thumb or box is at the specified location. scrollbarLeft Left scroll arrow is at the specified location. scrollbarPageDown Page-down scroll bar shaft is at the specified location. scrollbarPageLeft Page-left scroll bar shaft is at the specified location. scrollbarPageRight Page-right scroll bar shaft is at the specified location. scrollbarPageUp Page-up scroll bar shaft is at the specified location. scrollbarRight Right scroll arrow is at the specified location. scrollbarUp Up scroll arrow is at the specified location. scrollbarVThumb Vertical scroll thumb or box is at the specified location. 如果想一下子滚到最下面可以用下面的代码（IE和Firefox都可以用）： f(divContent.scrollHeight>divContent.offsetHeight) divContent.scrollTop=divContent.scrollHeight-divContent.offsetHeight; 注：divContent是一个带滚动条的div。
