Array()
FUNCTION: 返回一个数组
SYNTAX: Array(list)
ARGUMENTS: 字符,数字均可
EXAMPLE: <%
Dim myArray()
For i = 1 to 7
Redim Preserve myArray(i)
myArray(i) = WeekdayName(i)
Next
%[/IMG]
RESULT: 建立了一个包含7个元素的数组myArray
myArray("Sunday","Monday", ... ... "Saturday")

CInt()
FUNCTION: 将一个表达式转化为数字类型
SYNTAX: CInt(expression)
ARGUMENTS: 任何有效的字符均可
EXAMPLE: <%
f = "234"
response.write cINT(f) + 2
%[/IMG]
RESULT: 236
转化字符"234"为数字"234",如果字符串为空,则返回0值

CreateObject()
FUNCTION: 建立和返回一个已注册的ACTIVEX组件的实例。
SYNTAX: CreateObject(objName)
ARGUMENTS: objName 是任何一个有效、已注册的ACTIVEX组件的名字.
EXAMPLE: <%
Set con = Server.CreateObject("ADODB.Connection")
%[/IMG]
RESULT:

CStr()
FUNCTION: 转化一个表达式为字符串.
SYNTAX: CStr(expression)
ARGUMENTS: expression 是任何有效的表达式。
EXAMPLE: <%
s = 3 + 2
response.write "The result is: " & cStr(s)
%[/IMG]
RESULT: 转化数字“5”为字符“5”。

Date()
FUNCTION: 返回当前系统日期.
SYNTAX: Date()
ARGUMENTS: None.
EXAMPLE: <%=Date%[/IMG]
RESULT: 8/4/99

DateAdd()
FUNCTION: 返回一个被改变了的日期。
SYNTAX: DateAdd(timeinterval,number,date)
ARGUMENTS: timeinterval is the time interval to add; number is amount of time intervals to add; and date is the starting date.
EXAMPLE: <%
currentDate = #8/4/99#
newDate = DateAdd("m",3,currentDate)
response.write newDate
%[/IMG]

<%
currentDate = #12:34:45 PM#
newDate = DateAdd("h",3,currentDate)
response.write newDate
%[/IMG]
RESULT: 11/4/99
3:34:45 PM

"m" = "month";
"d" = "day";

If currentDate is in time format then,
"h" = "hour";
"s" = "second";

DateDiff()
FUNCTION: 返回两个日期之间的差值 。
SYNTAX: DateDiff(timeinterval,date1,date2 [, firstdayofweek [, firstweekofyear[/IMG][/IMG])
ARGUMENTS: timeinterval 表示相隔时间的类型,如“M“表示“月”。
EXAMPLE: <%
fromDate = #8/4/99#
toDate = #1/1/2000#
response.write "There are " & _
DateDiff("d",fromDate,toDate) & _
" days to millenium from 8/4/99."
%[/IMG]
RESULT: 从8/4/99 到2000年还有 150 天.

Day()
FUNCTION: 返回一个月的第几日 .
SYNTAX: Day(date)
ARGUMENTS: date 是任何有效的日期。
EXAMPLE: <%=Day(#8/4/99#)%[/IMG]
RESULT: 4

FormatCurrency()
FUNCTION: 返回表达式,此表达式已被格式化为货币值
SYNTAX: FormatCurrency(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit[/IMG][/IMG][/IMG][/IMG])
ARGUMENTS: Digit 指示小数点右侧显示位数的数值。默认值为 -1,指示使用的是计算机的区域设置;   LeadingDigit 三态常数,指示是否显示小数值小数点前面的零。
EXAMPLE: <%=FormatCurrency(34.3456)%[/IMG]
RESULT: $34.35

FormatDateTime()
FUNCTION: 返回表达式,此表达式已被格式化为日期或时间
SYNTAX: FormatDateTime(Date, [, NamedFormat[/IMG])
ARGUMENTS: NamedFormat 指示所使用的日期/时间格式的数值,如果省略,则使用 vbGeneralDate.
EXAMPLE: <%=FormatDateTime("08/4/99", vbLongDate)%[/IMG]
RESULT: Wednesday, August 04, 1999

FormatNumber()
FUNCTION: 返回表达式,此表达式已被格式化为数值.
SYNTAX: FormatNumber(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit[/IMG][/IMG][/IMG][/IMG])
ARGUMENTS: Digit 指示小数点右侧显示位数的数值。默认值为 -1,指示使用的是计算机的区域设置。; LeadingDigit i指示小数点右侧显示位数的数值。默认值为 -1,指示使用的是计算机的区域设置。; Paren 指示小数点右侧显示位数的数值。默认值为 -1,指示使用的是计算机的区域设置。; GroupDigit i指示小数点右侧显示位数的数值。默认值为 -1,指示使用的是计算机的区域设置。.
EXAMPLE: <%=FormatNumber(45.324567, 3)%[/IMG]
RESULT: 45.325

FormatPercent()
FUNCTION: 返回表达式,此表达式已被格式化为尾随有 % 符号的百分比(乘以 100 )。 (%)
SYNTAX: FormatPercent(Expression [, Digit [, LeadingDigit [, Paren [, GroupDigit[/IMG][/IMG][/IMG][/IMG])
ARGUMENTS: 同上.
EXAMPLE: <%=FormatPercent(0.45267, 3)%[/IMG]
RESULT: 45.267%

Hour()
FUNCTION: 以24时返回小时数.
SYNTAX: Hour(time)
ARGUMENTS:
EXAMPLE: <%=Hour(#4:45:34 PM#)%[/IMG]
RESULT: 16
(Hour has been converted to 24-hour system)

Instr()
FUNCTION: 返回字符或字符串在另一个字符串中第一次出现的位置.
SYNTAX: Instr([start, [/IMG] strToBeSearched, strSearchFor [, compare[/IMG])
ARGUMENTS: Start为搜索的起始值,strToBeSearched接受搜索的字符串 strSearchFor要搜索的字符compare 比较方式(详细见ASP常数)
EXAMPLE: <%
strText = "This is a test!!"
pos = Instr(strText, "a")
response.write pos
%[/IMG]
RESULT: 9

InstrRev()
FUNCTION: 同上,只是从字符串的最后一个搜索起
SYNTAX: InstrRev([start, [/IMG] strToBeSearched, strSearchFor [, compare[/IMG])
ARGUMENTS: 同上.
EXAMPLE: <%
strText = "This is a test!!"
pos = InstrRev(strText, "s")
response.write pos
%[/IMG]
RESULT: 13

Int()
FUNCTION: 返回数值类型,不四舍五入。
SYNTAX: Int(number)
ARGUMENTS:
EXAMPLE: <%=INT(32.89)%[/IMG]
RESULT: 32

IsArray()
FUNCTION: 判断一对象是否为数组,返回布尔值 .
SYNTAX: IsArray(name)
ARGUMENTS:
EXAMPLE: <%
strTest = "Test!"
response.write IsArray(strTest)
%[/IMG]
RESULT: False

IsDate()
FUNCTION: 判断一对象是否为日期,返回布尔值
SYNTAX: IsDate(expression)
ARGUMENTS: expression is any valid expression.
EXAMPLE: <%
strTest = "8/4/99"
response.write IsDate(strTest)
%[/IMG]
RESULT: True

IsEmpty()
FUNCTION: 判断一对象是否初始化,返回布尔值.
SYNTAX: IsEmpty(expression)
ARGUMENTS:
EXAMPLE: <%
Dim i
response.write IsEmpty(i)
%[/IMG]
RESULT: True

IsNull()
FUNCTION: 判断一对象是否为空,返回布尔值.
SYNTAX: IsNull(expression)
ARGUMENTS:
EXAMPLE: <%
Dim i
response.write IsNull(i)
%[/IMG]
RESULT: False

IsNumeric()
FUNCTION: 判断一对象是否为数字,返回布尔值.
SYNTAX: IsNumeric(expression)
ARGUMENTS:
EXAMPLE: <%
i = "345"
response.write IsNumeric(i)
%[/IMG]
RESULT: True
就算数字加了引号,ASP还是认为它是数字。

IsObject()
FUNCTION: 判断一对象是否为对象,返回布尔值.
SYNTAX: IsObject(expression)
ARGUMENTS:
EXAMPLE: <%
Set con = Server.CreateObject("ADODB.Connection")
response.write IsObject(con)
%[/IMG]
RESULT: True

LBound()
FUNCTION: 返回指定数组维的最小可用下标.
SYNTAX: Lbound(arrayname [, dimension[/IMG])
ARGUMENTS: dimension 指明要返回哪一维下界的整数。使用 1 表示第一维,2 表示第二维,以此类  推。如果省略 dimension 参数,默认值为 1.
EXAMPLE: <%
i = Array("Monday","Tuesday","Wednesday")
response.write LBound(i)
%[/IMG]
RESULT: 0

LCase()
FUNCTION: 返回字符串的小写形式
SYNTAX: Lcase(string)
ARGUMENTS: string is any valid string expression.
EXAMPLE: <%
strTest = "This is a test!"
response.write LCase(strTest)
%[/IMG]
RESULT: this is a test!

Left()
FUNCTION: 返回字符串左边第length个字符以前的字符(含第length个字符).
SYNTAX: Left(string, length)
ARGUMENTS:
EXAMPLE: <%
strTest = "This is a test!"
response.write Left(strTest, 3)
%[/IMG]
RESULT: Thi

Len()
FUNCTION: 返回字符串的长度.
SYNTAX: Len(string | varName)
ARGUMENTS:
EXAMPLE: <%
strTest = "This is a test!"
response.write Len(strTest)
%[/IMG]
RESULT: 15

LTrim()
FUNCTION: 去掉字符串左边的空格.
SYNTAX: LTrim(string)
ARGUMENTS:
EXAMPLE: <%
strTest = " This is a test!"
response.write LTrim(strTest)
%[/IMG]
RESULT: This is a test!

Mid()
FUNCTION: 返回特定长度的字符串(从start开始,长度为length).
SYNTAX: Mid(string, start [, length[/IMG])
ARGUMENTS:
EXAMPLE: <%
strTest = "This is a test! Today is Monday."
response.write Mid(strTest, 17, 5)
%[/IMG]
RESULT: Today

Minute()
FUNCTION: 返回时间的分钏.
SYNTAX: Minute(time)
ARGUMENTS:
EXAMPLE: <%=Minute(#12:45:32 PM#)%[/IMG]
RESULT: 45

Month()
FUNCTION: 返回日期.
SYNTAX: Month(date)
ARGUMENTS: date is any valid date expression.
EXAMPLE: <%=Month(#08/04/99#)%[/IMG]
RESULT: 8

MonthName()
FUNCTION: Returns a string identifying the specified month.
SYNTAX: MonthName(month, [, Abb[/IMG])
ARGUMENTS: month is the numeric representation for a given month; Abb (optional) is a boolean value used to display month abbreviation. True will display the abbreviated month name and False (default) will not show the abbreviation.
EXAMPLE: <%=MonthName(Month(#08/04/99#))%[/IMG]
RESULT: August

Now()
FUNCTION: Returns the current system date and time.
SYNTAX: Now()
ARGUMENTS: None
EXAMPLE: <%=Now%[/IMG]
RESULT: 8/4/99 9:30:16 AM

Replace()
FUNCTION: Returns a string in which a specified sub-string has been replaced with another substring a specified number of times.
SYNTAX: Replace(strToBeSearched, strSearchFor, strReplaceWith [, start [, count [, compare[/IMG][/IMG][/IMG])
ARGUMENTS: strToBeSearched is a string expression containing a sub-string to be replaced; strSearchFor is the string expression to search for within strToBeSearched; strReplaceWith is the string expression to replace sub-string strSearchFor; start (optional) is the numeric character position to begin search; count (optional) is a value indicating the comparision constant.
EXAMPLE: <%
strTest = "This is an apple!"
response.write Replace(strTest, "apple", "orange")
%[/IMG]
RESULT: This is an orange!

Right()
FUNCTION: 返回字符串右边第length个字符以前的字符(含第length个字符).
SYNTAX: Right(string, length)
ARGUMENTS: .
EXAMPLE: <%
strTest = "This is an test!"
response.write Right(strTest, 3)
%[/IMG]
RESULT: st!

Rnd()
FUNCTION: 产生一个随机数.
SYNTAX: Rnd [ (number) [/IMG]
ARGUMENTS:
EXAMPLE: <%
Randomize()
response.write RND()
%[/IMG]
RESULT: 任何一个在0 到 1 之间的数

Round()
FUNCTION: 返回按指定位数进行四舍五入的数值.
SYNTAX: Round(expression [, numRight[/IMG])
ARGUMENTS: numRight数字表明小数点右边有多少位进行四舍五入。如果省略,则 Round 函数返回整数.
EXAMPLE: <%
i = 32.45678
response.write Round(i)
%[/IMG]
RESULT: 32

Rtrim()
FUNCTION: 去掉字符串右边的字符串.
SYNTAX: Rtrim(string)
ARGUMENTS:
EXAMPLE: <%
strTest = "This is a test!! "
response.write RTrim(strTest)
%[/IMG]
RESULT: This is a test!!

Second()
FUNCTION: 返回秒.
SYNTAX: Second(time)
ARGUMENTS: .
EXAMPLE: <%=Second(#12:34:28 PM#)%[/IMG]
RESULT: 28

StrReverse()
FUNCTION: 反排一字符串
SYNTAX: StrReverse(string)
ARGUMENTS:
EXAMPLE: <%
strTest = "This is a test!!"
response.write StrReverse(strTest)
%[/IMG]
RESULT: !!tset a si sihT

Time()
FUNCTION: 返回系统时间.
SYNTAX: Time()
ARGUMENTS: .
EXAMPLE: <%=Time%[/IMG]
RESULT: 9:58:28 AM

Trim()
FUNCTION: 去掉字符串左右的空格.
SYNTAX: Trim(string)
ARGUMENTS: string is any valid string expression.
EXAMPLE: <%
strTest = " This is a test!! "
response.write Trim(strTest)
%[/IMG]
RESULT: This is a test!!

UBound()
FUNCTION: 返回指定数组维数的最大可用下标.
SYNTAX: Ubound(arrayname [, dimension[/IMG])
ARGUMENTS: dimension (optional) 指定返回哪一维上界的整数。1 表示第一维,2 表示第二维,以此类推。如果省略 dimension 参数,则默认值为 1.
EXAMPLE: <%
i = Array("Monday","Tuesday","Wednesday")
response.write UBound(i)
%[/IMG]
RESULT: 2

UCase()
FUNCTION: 返回字符串的大写形式.
SYNTAX: UCase(string)
ARGUMENTS:
EXAMPLE: <%
strTest = "This is a test!!"
response.write UCase(strTest)
%[/IMG]
RESULT: THIS IS A TEST!!

VarType()
FUNCTION: 返回指示变量子类型的值
SYNTAX: VarType(varName)
ARGUMENTS:
EXAMPLE: <%
i = 3