//显示登录
function ShowDIV()
{
   var element = document.getElementById('LoginDIV');
   element.style.display = 'block';
   element.style.left = 400;
   element.style.top = 100;
}

//隐藏登录
function HideDIV()
{
   var element = document.getElementById('LoginDIV');
   element.style.display = 'none';
}

//键盘回车
function handleEnter(field, event)
{
	var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
	if (keyCode == 13)
	{
		checkusertoplogin( document.all.userlogintopform);
		return false;
	}
	else
	{
		return true;
	}    
}
function checkNavigator()
{
        if(navigator["cookieEnabled"]==false)
        {
            alert("温馨提示：\n\n对不起，登陆操作需要先开启您浏览器的Cookies才能正常登陆！");
        }
}
//定义对象;
var mObjLogin = null;
var pXLogin,pYLogin;
document.onmousemove=ObjMoveLogin;
document.onmouseup=ObjUpLogin;
//开始拖动;
function startDragLogin(ObjLogin)
{ 
  mObjLogin = document.getElementById(ObjLogin);
  pXLogin = mObjLogin.style.pixelLeft - event.clientX;
  pYLogin = mObjLogin.style.pixelTop - event.clientY;
  //alert(pXLogin+pYLogin);
}
//拖动;
function ObjMoveLogin()
{
  if(mObjLogin)
  {
    mObjLogin.style.left = pXLogin + event.clientX;
    mObjLogin.style.top = pYLogin + event.clientY;
    mObjLogin.style.filter = "alpha(opacity=90)";
    event.returnValue = false;
  }
}
//停止拖动;
function ObjUpLogin()
{
 if(mObjLogin)
  {
    mObjLogin.style.filter = "alpha(opacity=98)";
    mObjLogin = null;
  }
}

function getDataTime()
{
	var strDate,strTime;
	strDate = new Date();
	strTime = strDate.getTime();
	return strTime;
}
function toggleTo(img) 
{ 
var ts=document.getElementById("tab").getElementsByTagName("div"); 
for(i=1;i<ts.length+1;i++){ 
if(img==i) 
{ 
document.getElementById("oDIV"+i).style.display = ""; 
document.getElementById("oDIV"+i).parentNode.className+=" up"; 
} 
else{ 
document.getElementById("oDIV"+i).style.display = "none"; 
document.getElementById("oDIV"+i).parentNode.className="tab"+i; 
} 
} 
} 
function mysubmit(theform)
{
    if(theform.big.value=="")
    {
    alert("请点击浏览按钮，选择您要上传的jpg或gif文件!")
    theform.big.focus;
    return (false);
    }
    else
    {
    str= theform.big.value;
    strs=str.toLowerCase();
    lens=strs.length;
    extname=strs.substring(lens-4,lens);
    if(extname!=".jpg" && extname!=".gif")
    {
    alert("请选择jpg或gif文件!");
    return (false);
    }
    }
    return (true);
}