//要显示的logo，数量自动识别
var scroll_content = new Array();
scroll_content[0] = '<a href="http://www.break-day.com/ver3.0/news/company/49.htm" target="_blank"><img src="http://www.break-day.com/ver3.0/images/2009/banner_03.24.jpg" border="0" /></a>';
scroll_content[1] = '<img src="/en/images/ad/index_banner.jpg" width="602" height="94" border="0" />';
scroll_content[2] = '<a href="/en/mobile_crushing_screening_plant.htm"><img src="/en/images/ad/mobile_crusher.jpg" width="602" height="94" border="0" /></a>';


var scrollerheight = 100;			//一次滚动的高度
var html = "";
var total_area = 0;
var wait_flag = true;
var bMouseOver = 1;
var scrollspeed = 2;                                                                       
var waitingtime = 5000;                                                              
var s_tmp = 0;
var s_amount = 50;
var startPanel = 0;
var n_panel = 0;
var i = 0;

function startscroll()
{
		i=0;
		for (i in scroll_content)
				n_panel++;

		n_panel = n_panel -1 ;
		startPanel = Math.round(Math.random()*n_panel);
		if(startPanel == 0)
		{
				i=0;
				for (i in scroll_content)
						insert_area(total_area, total_area++); 
		}
		else if(startPanel == n_panel)
		{
				insert_area(startPanel, total_area);
				total_area++;
				for (i=0; i<startPanel; i++)
				{
						insert_area(i, total_area); 
						total_area++;
				}
		}
		else if((startPanel > 0) || (startPanel < n_panel))
		{
				insert_area(startPanel, total_area);
				total_area++;
				for (i=startPanel+1; i<=n_panel; i++)
				{
						insert_area(i, total_area); 
						total_area++;
				}
				for (i=0; i<startPanel; i++)
				{
						insert_area(i, total_area); 
						total_area++;
				}
		}
		window.setTimeout("scrolling()",waitingtime);
}

function scrolling(){
		if (bMouseOver && wait_flag)
		{
				for (i=0;i<total_area;i++){
						tmp = document.getElementById('scroll_area'+i).style;
						tmp.top = parseInt(tmp.top)-scrollspeed;
						if (parseInt(tmp.top) <= -scrollerheight){
								tmp.top = scrollerheight*(total_area-1);
						}
						if (s_tmp++ > (s_amount-1)*scroll_content.length){
								wait_flag=false;
								window.setTimeout("wait_flag=true;s_tmp=0;",waitingtime);
						}
				}
		}
		window.setTimeout("scrolling()",1);
}

function insert_area(idx, n){ 
		html='<div style="left: 0px; width: 100%; position: absolute; top: '+(scrollerheight*n)+'px" id="scroll_area'+n+'">\n';
		html+=scroll_content[idx]+'\n';
		html+='</div>\n';
		document.write(html);
}

startscroll();