/* 
	@Author Kevinick <kevinick@hotmail.com>
	@version $Id: autoscroll.js 93 2011-08-19 10:32:20Z kevinick $
*/

/**
 * 文本自动滚动，轮换公告
 */
var li_high = 30;
var scr_obj = document.getElementById('notice_list');
var scr_txt = scr_obj.getElementsByTagName( 'li' );
var scr_height = scr_txt.length * li_high;
var cur_height = 0;
var t;
function AutoScroll(auto) {
	if(typeof(auto) != 'undefined') {
		scr_obj.style.top = (cur_height-3) + 'px';
	}
	cur_height = scr_obj.style.top.replace('px', '');
	if(cur_height*-1 == scr_height) {
		cur_height = li_high;
		scr_obj.style.top = cur_height + 'px';
	}
	if(cur_height % li_high != 0) {
		var t = window.setTimeout("AutoScroll(1)", 30);
	} else {
		if(cur_height == li_high) {
			AutoScroll(1);
		} else {
			var t = window.setTimeout("AutoScroll(1)", 5000);
		}
	}
}

AutoScroll();