broadcast.js

来自「LiteBlaster 是一款基于 .NET Framework 原创的 ASP」· JavaScript 代码 · 共 46 行

// for broadcast
// x_core.js needed

var broadcast_lineheight = 24;
var broadcast_body;
var broadcast_pausescroll = false;

function broadcastInit(){
	broadcast_body = xGetElementById('BroadcastBody');
	broadcast_body.onmouseover = new Function('broadcast_pausescroll = true');
	broadcast_body.onmouseout = new Function('broadcast_pausescroll = false');
	broadcast_body.scrollTop = 0;
	if(navigator.userAgent.toLowerCase().indexOf('msie') < 0){
		//non IE browsers needed an offset
		var parent = xGetElementById(broadcast_body).parentNode;
		broadcast_lineheight += xGetComputedStyle(parent, 'padding-top', true);
	}
	setInterval('broadcastScroll()', 15);
}

broadcastInit();

var broadcast_holdtime = 0;
var broadcast_deltaheight = 0;
var broadcast_pre_scrolltop = 0;

function broadcastScroll(){
	if(broadcast_pausescroll){
		return;
	}
	if(broadcast_deltaheight >= broadcast_lineheight){
		broadcast_holdtime++;
		if(broadcast_holdtime >= 120){
			broadcast_deltaheight = 0;
			broadcast_holdtime = 0;
		}
	}else{
		broadcast_deltaheight++;
		broadcast_pre_scrolltop = broadcast_body.scrollTop;
		broadcast_body.scrollTop++;
		if(broadcast_body.scrollTop == broadcast_pre_scrolltop){
			broadcast_body.scrollTop = 0;
			broadcast_deltaheight = 0;
		}
	}
}