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)
%>
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)
%>
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)
%>
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)
%>
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)
%>
result:true
lbound()
function:返回指定数组维的最小可用下标.
syntax:lbound(arrayname [, dimension])
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)
%>
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)
%>
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)
%>
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)
%>
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)
%>
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])
arguments:
example:<%
strtest = "this is a test! today is monday."
response.write mid(strtest, 17, 5)
%>
result:today
minute()
function:返回时间的分钏.
syntax:minute(time)
arguments:
example:<%=minute(#12:45:32 pm#)%>
result:45
month()
function:返回日期.
syntax:month(date)
arguments:date is any valid date expression.
example:<%=month(#08/04/99#)%>
result:8
monthname()
function:returns a string identifying the specified month.
syntax:monthname(month, [, abb])
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#))%>
result:august
now()
function:returns the current system date and time.
syntax:now()
arguments:none
example:<%=now%>
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]]])
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")
%>
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)
%>
result:st!
rnd()
function:产生一个随机数.
syntax:rnd [ (number) ]
arguments:
example:<%
randomize()
response.write rnd()
%>
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])
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)
%>
ASP中的函数说明[2]
[入库：2005年8月18日] [更新：2007年3月25日]
本文简介：选择自 asthlon 的 blog
本文关键：ASP中的函数说明
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