//[系统]下拉菜单
function out(val)
{
  //val.style.visibility="hidden";
  val.style.display='none'
}

function show(val)
{
	//val.style.visibility='visible'
	val.style.display='block'
}

//[系统]留言内容显示
function inputClear(val,txt)
{
	if(val.value == txt)
	{
		val.value = ""
	}
}
function inputShow(val,txt)
{
	if(val.value=="")
	{
		val.value = txt	
		//val.style.color="#666"
	}
}
//在线反馈表单检查
function CheckForm()
{
		if (document.OrderForm.linkman.value == """")
		{
			alert(""联系人不能为空！"");
			document.OrderForm.linkman.focus();
			return false;
		}
		if (document.OrderForm.phone.value == """")
		{
			alert(""电话不能为空！"");
			document.OrderForm.phone.focus();
			return false;
		}
		if (document.OrderForm.email.value == """")
		{
			alert(""Email地址不能为空！"");
			document.OrderForm.email.focus();
			return false;
		}
		if (!check_email(document.OrderForm.email.value))
		{
			validity = false;
			alert(""Email地址格式错误！"");
			document.OrderForm.email.focus();
			return false;
		}
}
//检查E-Mail地址是否正确
function check_email(address)
{
	if ((address == """")|| (address.indexOf ('@') == -1)|| (address.indexOf ('.') == -1))  return false;  return true;
}
//输入时只能是数字
var isNS4 = (navigator.appName=='Netscape')?1:0
function ChkisNum()
{
	if(!isNS4)
	{
		if(event.keyCode < 45 || event.keyCode > 57) event.returnValue = false;
	}
	else
	{
		if(event.which < 45 || event.which > 57) return false;
	}
}