var IsIE;
	
	var nav_AppName = window.navigator.appName;
	
	if(nav_AppName == "Microsoft Internet Explorer")
	{
		IsIE = true;
	}
	else
	{
		IsIE = false;
	}

function checkspace(checkstr) {
  var str = '';
  for(i = 0; i < checkstr.length; i++) {
    str = str + ' ';
  }
  return (str == checkstr);
}

function checkdate(str)
{
    var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); 
    if(r==null)return false; 
    var d= new Date(r[1], r[3]-1, r[4]); 
    return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}

function checknumber(str)
{
    var r = str.match(/^(\d{1,})$/); 
    if(r==null)return true; 
}

function checkUserName(str)
{
	var r = str.match(/[^A-Za-z0-9_\u0391-\uFFE5]/g);
	if (r==null) return false;
	return true;
}

function checkemail(str)
{
	var r = str.match(/^([^(=)])((\w)+[@]{1}((\w)+[.]){1,3}(\w)+)$/);
	if (r==null) return true;
	return false;
}
function OpenWindow(vUrl,vWidth,vHeight)
{
	window.open(vUrl,"","Toolbar = no,menubar=no,scrollbars=yes,status=no,location=no,resizable = yes,directories=no,width="+vWidth+",height="+vHeight)

}
function $(id)
{
	if(typeof(id)=="string")
	{
		return document.getElementById(id);
	}
	return id;
}
function checkform()
{
	var IsPost=0;
	if(document.all.Kind.value=="0")
	{
		alert("请选择学科类别!");	
		document.all.Kind.focus();
		IsPost=1;
		return;
	}
	//if(document.all.Type.value=="0")
//	{
//		alert("请选择文章类别!");	
//		document.all.Type.focus();
//		IsPost=1;
//		return;
//	}

	if((document.getElementById("Derivation").checked==false))
	{	

		if(document.getElementById("Der_Other").value=="") 
		{
			alert("请填写出处!");	
			document.all.Der_Other.focus();
			IsPost=1;
			return;
		}
	}
	
	if(document.getElementById("Ctitle").value=="")
	{
		alert("请输入文章标题!");	
		document.all.Ctitle.focus();
		IsPost=1;
		return;
	}
	if(document.getElementById("Author").value=="")
	{
		alert("请输入文章作者!");	
		document.all.Author.focus();
		IsPost=1;
		return;
	}
	
	if (IsPost==0)
	{
		document.ArticleForm.submit();	
	}
}

function checkLoginform()
{
	var intfalg=0;
	if (document.all.UserName.value=="")
	{
		alert("请输入作者登录名！");
		document.all.UserName.focus();
		intfalg=1;
		return false;
	}
	if (document.all.Password.value=="")
	{
		alert("请输入作者登录密码！");
		document.all.Password.focus();
		intfalg=1;
		return false;
	}
	if(intfalg==0)
	{
		document.LoginForm.submit();
	}
	else
	{
		return false;
	}
	
}