function ScrollPanel(element, h) {
	var h = h;
	var speed = 0.5;
	var interval
	if ( byTag(element, "LI").length <= 8) {
		return;
	}
	var ul = byTag(element, "UL")[0];
	ul.innerHTML += ul.innerHTML;
	var lis = byTag(element, "LI");
	ul.style.height = (lis.length) * h + "px";

	ul.onmouseover = function() {
		clearInterval(interval)
	}
	ul.onmouseout = function() {
		interval = setInterval(loop,10);
	}

	ul.style.top = "0px";
	ul.style.position = "absolute";
	ul.parentNode.style.position = "relative";
	var p = 0;

	interval = setInterval(loop,10);
	function loop(){
		p -= speed;
		if (p <= -lis.length/2 * h) {
			p = 0;
		}
		ul.style.top = p + "px";
	}
}

function checkMsg(){
			if(byId('_name').value == ''){
				byId('errmsg').innerHTML = '用户名不能为空！';
				byId('_name').focus();
				return false;
			}
			if(byId('_mobile').value == ''){
				byId('errmsg').innerHTML = '手机号码不能为空！';
				byId('_mobile').focus();
				return false;
			}
			if(byId('_address').value == ''){
				byId('errmsg').innerHTML = '联系地址不能为空！';
				byId('_address').focus();
				return false;
			}
			if(byId('_title').value == ''){
				byId('errmsg').innerHTML = '留言标题不能为空！';
				byId('_title').focus();
				return false;
			}
			if(byId('_content').value == ''){
				byId('errmsg').innerHTML = '留言内容不能为空！';
				byId('_content').focus();
				return false;
			}

		}


		function checkSearch(){
  		if(byId('_keyword').value == ''){
  			alert('关键字不能为空！');
  			byId('_keyword').focus();
  			return false;
  		}
  	}