//检查字段是否选择
	function checkdatanosel(objName,alertStr)
	{
		if (objName.value  == "-1")
		{
			alert( alertStr);
			objName.focus;
			return  false;
		}
		return true;
	}
	
	
	//检查字段是否为空
	function checkdataempty(objName,alertStr)
	{
		if (objName.value == "")
		{
			alert( alertStr);
			objName.focus;
			return  false;
		}
		return true;
	}
	
	//检查字段长度是否足够
	function checkdatalen(objName,alertStr,dataLen)
	{
		if (objName.value.length != dataLen)
		{
			alert( alertStr);
			objName.focus;
			return  false;
		}
		return true;
	}
	
	//检查字段长度是否越界
	function checkdatamaxlen(objName,alertStr,dataLen)
	{
		if (objName.value.length > dataLen)
		{
			alert(alertStr);
			objName.focus;
			return  false;
		}
		return true;
	}
	
	//检查字段长度是否不够
	function checkdataminlen(objName,alertStr,dataLen)
	{
		if (objName.value.length < dataLen)
		{
			alert( alertStr);
			objName.focus;
			return  false;
		}
		return true;
	}
	
	//检查float数值型数据
	function checkfloat(objName,alertStr)
	{
		var checkOK = "0123456789.";
		var checkStr = objName.value;
		var allValid = true;
		var decPoints = 0;
		var allNum = "";
		for (i = 0;  i < checkStr.length;  i++)
		{
		  ch = checkStr.charAt(i);
		  for (j = 0;  j < checkOK.length;  j++)
		    if (ch == checkOK.charAt(j))
		      break;
		  if (j == checkOK.length)
		  {
		    allValid = false;
		    break;
		  }
		  allNum += ch;
		}
		if (!allValid)
		{
		  alert(alertStr);
		  objName.focus();
		  return (false);
		}	
		return true;
	}
	
	//检查number数值型数据
	function checknumber(objName,alertStr)
	{
		var checkOK = "0123456789";
		var checkStr = objName.value;
		var allValid = true;
		var decPoints = 0;
		var allNum = "";
		for (i = 0;  i < checkStr.length;  i++)
		{
		  ch = checkStr.charAt(i);
		  for (j = 0;  j < checkOK.length;  j++)
		    if (ch == checkOK.charAt(j))
		      break;
		  if (j == checkOK.length)
		  {
		    allValid = false;
		    break;
		  }
		  allNum += ch;
		}
		if (!allValid)
		{
		  alert(alertStr);
		  objName.focus();
		  return (false);
		}	
		return true;
	}
	
	
	//检查电子邮件是否有效
	function checkemail(objName,alertStr)
	{
		var charat = "@";
		var chary = objName.value;
		
		if(!(chary.indexOf(charat,0)>0))
		{
			alert(alertStr);
			objName.focus;
			return  false;
		}
						
		return true;
	}
	
	//返回上一页面
	function goback()
	{
		window.history.go(-1);
	}
	
//add by yangg  客户端cookie设置

function getCookieVal(offset) {
	var endstr=document.cookie.indexOf(";",offset);
	if(endstr==-1)
	endstr=document.cookie.length;
	return unescape(document.cookie.substring(offset,endstr));
}

function GetCookie(name){
	var arg=name+"=";
	var alen=arg.length;
	var clen=document.cookie.length;
	var i=0;
	while(i<clen)
	{
		var j=i+alen;
		if(document.cookie.substring(i,j)==arg)
			return getCookieVal(j);
			i=document.cookie.indexOf(" ",i)+1;
			if(i==0)
				break;
	}
	return null;
}

function SetCookie(name,value){
	var argv=SetCookie.arguments;
	var argc=SetCookie.arguments.length;
	var expires=(2<argc)?argv[2]:null;
	var path=(3<argc)?argv[3]:null;
	var domain=(4<argc)?argv[4]:null;
	var secure=(5<argc)?argv[5]:false;document.cookie=name+"="+escape(value)+((expires==null)?"":("; expires="+expires.toGMTString()))+((path==null)?"":("; path="+path))+((domain==null)?"":("; domain="+domain))+((secure==true)?"; secure":"");
}

//end add	
	
	function CheckValue()
	{
		document.all("_MailboxLoginForm").submit();
	}