// =============================================================
// 滚动内容部分

var iTimer;
// oScrollDivHeight 等于滚动内容部分层的高度
var oScrollDivHeight = 280;
// oScrollBarHeight 等于滚动条部分的高度减去滑块的高度
var oScrollBarHeight = 240;
// oTime 为滚动频率
var oTime = 180;
function downIt()
{
//alert(mq.scrollHeight)
clearInterval(iTimer);

iTimer = setInterval("mq.doScroll('down');divImg.style.top=mq.scrollTop*oScrollBarHeight/(mq.scrollHeight-oScrollDivHeight)", oTime);

}
function upIt(){
clearInterval(iTimer);
iTimer = setInterval("mq.doScroll('up');divImg.style.top=mq.scrollTop*oScrollBarHeight/(mq.scrollHeight-oScrollDivHeight)", oTime);
}

var scroll,oldY=0;

function startScroll(){
	if(iTimer) clearInterval(iTimer);
	scroll=true;
	divImg.setCapture();

	if (oldY==0) {
		oldY = event.y-divImg.style.posTop;
	}
}

function scrollIt()
{
	if (scroll==true && event.y>=oldY && event.y<=oScrollBarHeight+oldY && mq.scrollHeight>oScrollDivHeight){
	divImg.style.posTop=event.y-oldY;
	mq.scrollTop = (event.y-oldY)/oScrollBarHeight*(mq.scrollHeight-oScrollDivHeight);
}}

function stopScroll(){
	document.releaseCapture();
	scroll=false;
}