function CheckEmpty(Field, FieldTitle)
	{
		if (Field.value == "")
		{
			alert("请在\"" + FieldTitle + "\"中输入值.");
			Field.focus();
			return false;
		}
		
		return true;
	}
	
	
function CheckInteger(Field, FieldTitle)
	{
		if (Field.value != "")
		{
			for (i = 0; i < Field.value.length; i++)
			{
				ch = Field.value.charAt(i);
				
				if ( (ch < '0' || ch > '9') && ch != '-' ) {
					alert("\"" + FieldTitle + "\"中只能输入数字.");
					Field.focus();
					return	false;
				}
			}
		}
		
		return true;
	}
	
function CheckReal(Field, FieldTitle)
	{
		if (Field.value != "")
		{
			DotNum = 0;
			for (i = 0; i < Field.value.length;  i++)
			{
				ch = Field.value.charAt(i);
				
				if ((ch < '0' || ch > '9') && ch != '.') 
				{
					alert("\"" + FieldTitle + "\"中只能输入数字.");
					Field.focus();
					return false;
				}
				
				if (ch == '.')
				{
					if (DotNum > 0) 
					{
						alert("\"" + FieldTitle + "\"中只能输入一个小数点.");
						Field.focus();
						DotNum++;
						return false;
					}
				}
			}
		}
		
		return	true;
	}

function CheckMaxLength(Field, MaxLength, FieldTitle)
	{
		if (Field.value != "")
		{
			if (Field.value.length > MaxLength)
			{
				alert("\"" + FieldTitle + "\"中输入的字符请不要超过" + MaxLength + "字符.");
				Field.focus();
				return false;
			}
		}
		
		return true;
	}
	
function CheckOption(Field, FieldTitle) 
	{
		for (i = 0; i < Field.length; i++)
			if (Field[i].checked)
				return true;
				
		alert("请选择\"" + FieldTitle + "\"中的值.");
		return false;
	}

	//此函数用于判断Email地址是否正确
function CheckEmail(Field)
{

   // there must be >= 1 character before @, so we
   // start looking at character position 1
   // (i.e. second character)
   var i = 1;
   var len = Field.value.length;

	if (len > 50)
	{
		window.alert("email地址长度不能超过50位!");
		return false;
	}
	
	pos1 = Field.value.indexOf("@");
	pos2 = Field.value.indexOf(".");
	pos3 = Field.value.lastIndexOf("@");
	pos4 = Field.value.lastIndexOf(".");
	//check '@' and '.' is not first or last character
	if ((pos1 <= 0)||(pos1 == len-1)||(pos2 <= 0)||(pos2 == len-1))  
	{
		window.alert("请输入有效的E-mail地址！");
		return false;
	}
	else
	{
		//check @. or .@
		if( (pos1 == pos2 - 1) || (pos1 == pos2 + 1) 
		  || ( pos1 != pos3 )  //find two @
		  || ( pos4 < pos3 ) ) //. should behind the '@'  		
		{
			window.alert("请输入有效的E-mail地址！");
			return false;
		}
	}
	return true;
}

function CheckMinLength(Field, MinLength, FieldTitle)
	{
		if (Field.value != "")
		{
			if (Field.value.length < MinLength)
			{
				alert("\"" + FieldTitle + "\"中输入的字符请不要少于" + MinLength + "字符.");
				Field.focus();
				return false;
			}
		}
		
		return true;
	}
	function CheckField(Field, FieldTitle)
	{
		if (Field.value != "")
		{
			for (i = 0; i < Field.value.length; i++)
			{ 
				var ch2
				ch = Field.value.charAt(i);
				ch2 = Field.value.charCodeAt(i);
				
					if(eval(ch2 - 0x80) >= 0) 
					{   
						
					}
					else
					{
						if ( (ch < '0' || ch > '9') && ch != '-' && ch!='_' &&(ch < 'a' || ch > 'z') && (ch < 'A' || ch > 'Z') ) 
						{
							alert("\"" + FieldTitle + "\"中只能输入中文字符、字母和数字或下划线.");
							Field.focus();
							return	false;
						}
					}
			}
		}
		
		return true;
	}
function CheckAgain(Field, FieldTitle)
	{
	if (Field.value != "")
		{
		var temp;
		pos1 = Field.value.indexOf("@");
		
		temp=Field.value.substring(1,pos1-1);
		
			for (i = 0; i < temp.length; i++)
			{
				ch = temp.charAt(i);
				
				
				if ( (ch < '0' || ch > '9') && ch != '-' && ch!='_' &&(ch < 'a' || ch > 'z') && (ch < 'A' || ch > 'Z') ) {
							alert("\"" + FieldTitle + "\"中只能输入字母和数字或下划线.");
							Field.focus();
							return	false;
					}
			
			}
			}
		
		return true;
	}
function ChangeValue(theForm)
{
var i,bHZ,nLen,name,tempValue;
name = theForm.USER.value;
nLen = name.length;
bHZ = false;
tempValue="";
 for(i=0;i<nLen;i++)
 {
	var ch,j,ch1;
	ch1 = theForm.USER.value.charCodeAt(i);
	ch = theForm.USER.value.charAt(i);
	
	if(eval(ch1 - 0x80) >= 0) 
		{   
			
		}
		else
		{
		if ( (ch < '0' || ch > '9') && ch!= '-' && ch!='_' &&(ch < 'a' || ch > 'z') && (ch < 'A' || ch > 'Z') )
			{
			
			}
			else
			{
				tempValue=tempValue+ch;
			}
		}
  }
		 
	//if (!bHZ)theForm.EMAIL.value=theForm.USER.value+"@sinoi.com";
	// theForm.EMAIL.value=tempValue+"@SINOi.com";
		
}

function CheckDate()          
{

    ymd=theForm.date.value.split("-");
    month=ymd[1]-1
       var Date = new Date(ymd[0],month,ymd[2]); 
if (Date.getMonth()+1!=ymd[1]||Date.getDate()!=ymd[2]||Date.getFullYear()!=ymd[0]||ymd[0].length!=4)
    {
       alert("非法日期,请依【YYYY-MM-DD】格式输入");
        theForm.date.focus();
        return false;          
        }
alert("输入日期:" + theForm.date.value);
return true;
}

function CheckPROVCITY(theForm) 
	{
		if ((theForm.PROV.value == "山东省") & (theForm.CITY.value == "其它"))
		{
			alert("请选择正确的所在城市（山东省）.");
			return false;
		}

		if ((theForm.PROV.value != "山东省") & (theForm.CITY.value != "其它"))
		{
			alert("请选择正确的所在城市、地区组合.");
			return false;
		}
		return true;
	}

function CheckZIPLength(theForm)
	{
		if ((theForm.ZIP.value.length != 6) & (theForm.ZIP.value.length != 0))
			{
				alert( "如果填写邮政编码，必须是6位数字.");
				theForm.ZIP.focus();
				return false;
		}
		
		return true;
	}

function CheckMail(theForm)
{  
	if (!CheckEmpty(theForm.TITLE, "信件标题"))				return false;
}


function CheckTel(theForm)
{  
	if (!CheckEmpty(theForm.TEL, "联系方式（电话/手机/传呼）"))				return false;
}

function CheckMess(theForm)
{  
	if (!CheckEmpty(theForm.TITLE, "信息标题"))				return false;
	if (!CheckEmpty(theForm.HTTP, "超级连接"))				return false;
}

function CheckAccount(theForm)
{  
	if (!CheckEmpty(theForm.USER, "帐号"))				return false;
	if (!CheckMinLength(theForm.USER, 2, "帐号"))		return false;
	if (!CheckMaxLength(theForm.USER, 16, "帐号"))		return false;
	if (!CheckField(theForm.USER, "帐号"))				return false;
	if (!CheckEmpty(theForm.PASS, "密码"))					return false;
	if (!CheckMinLength(theForm.PASS, 4, "密码"))			return false;
	if (!CheckMaxLength(theForm.PASS, 16, "密码"))			return false; 
	if (!CheckEmpty(theForm.PASS2, "密码确认"))		return false;	 
	if (theForm.PASS2.value != theForm.PASS.value)
	{
	  alert("密码确认与密码内容不一致。");
	  theForm.PASS2.focus();
	  return (false);
	}
	if (!CheckEmpty(theForm.EMAIL, "E-mail信箱"))				return false;
	if (!CheckAgain(theForm.EMAIL, "E-mail信箱"))				return false;
	if (!CheckEmail(theForm.EMAIL))								 return false;
	if (!CheckPROVCITY(theForm))								 return false;
	if (!CheckInteger(theForm.ZIP, "邮政编码"))						 return false;
	if (!CheckZIPLength(theForm))		return false;
	if (!CheckMaxLength(theForm.CITY2, 30, "地区关键字"))		return false;
}
function CheckAcc(theForm)
{  
	if (!CheckEmpty(theForm.R_USER, "帐号"))				return false;
	if (!CheckMinLength(theForm.R_USER, 2, "帐号"))		return false;
	if (!CheckMaxLength(theForm.R_USER, 16, "帐号"))		return false;
}