var sid=null;
var ss=0;	//记录移动了多少
var step = 10;	//步长
var timeId=null;
var slider=function(){
	id=$("#scrollText").attr("id");
	sid=id
	var currentH=$("#"+id).height();	//要滚动的层的id
	var parentH=$("#"+id).parent().height();	//滚动层的父id
	var diff=currentH-parentH;	//滚动层与其父id的差值，判断是否大于零而且大于步长
	
	if(0 < diff && diff >= step){
		var top=parseInt($("#"+id).css("top"));	//top是一个负值
		if(top+diff > 0){
			timeId = window.setInterval(doslider, 30);
		} else {
			window.clearInterval(timeId);
			$("#"+id).css("top", 0);
			window.setTimeout(slider, 2000);
		}
	} else {
		$("#"+id).css("top", 0);
	}
}
var doslider=function(){
	if (ss < step) {
		var top=parseInt($("#"+sid).css("top"));
		$("#"+sid).css("top", top-2);
		ss++;
	} else {
		var firstHtml=$("#"+sid).children(":first");
		$("#"+sid).children(":first").remove();
		$("#"+sid).append(firstHtml);
		$("#"+sid).css("top", 0);
		window.clearInterval(timeId);
		ss=0;
		window.setTimeout(slider, 3000);
	}
}

function copyToClipBoard(){
    var clipBoardContent="我发现一个可以查询火车票余票查询及在线订火车票的网站特别推荐给你使用,网址是：www.gz-station.com";
	var clipBoardSay = "推荐信息复制成功，请粘贴到你的QQ/MSN上发送消息给你的好友 ^_^";
	//clipBoardContent+=this.location.href;
	
		if(window.clipboardData) {
			window.clipboardData.clearData();
			window.clipboardData.setData("Text", clipBoardContent);
			alert(clipBoardSay);
		} else if(navigator.userAgent.indexOf("Opera") != -1) {
			window.location = clipBoardContent;
		} else if (window.netscape) {
			try {
			netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
		} catch (e) {
			alert("被浏览器拒绝！\n请在浏览器地址栏输入'about:config'并回车\n然后将'signed.applets.codebase_principal_support'设置为'true'");
			}
			var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
			if (!clip) return;
			var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
			if (!trans) return;
			trans.addDataFlavor('text/unicode');
			var str = new Object();
			var len = new Object();
			var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
			var copytext = clipBoardContent;
			str.data = copytext;
			trans.setTransferData("text/unicode",str,copytext.length*2);
			var clipid = Components.interfaces.nsIClipboard;
			if (!clip) return false;
			clip.setData(trans,null,clipid.kGlobalClipboard);
			alert(clipBoardSay);
		 }
}