VBScript Functions

1
VBScript Functions Subroutines

• MIS 3353 -- Web Site Development

2
Functions, Subroutines, Arguments

• Arguments are the values brought into and used in
  the subprogram
• Syntax for calls
• Functions
• FunctionName(arg1,arg2, . . .)
• FunctionName
• Subroutines
• SubroutineName arg1, arg2, . . .
• SubroutineName

3
Intrinsic Functions

• Date Time
• String Manipulation
• Numeric
• Other

4
Date Time Functions

• Time
• Date
• Now -- returns both date and time
• Day(date)
• Month(date)
• Year(date)
• Weekday(date)
• WeekdayName(number)
• MonthName (number)
• DateDiff(date1,date2) -- returns number of days
  difference
• DateAdd(date,number) -- returns new date

5
String Manipulation Functions

• Instr(search,target)
• Len(string)
• LCase(string) -- converts case
• LTrim(string) -- trims blanks
• Trim(string)
• Space(n) -- returns n spaces
• String(n,character) -- returns n characters
• Left(string,n) -- returns left n characters
• Mid(string,x,n) -- returns n characters starting
  at x

6
Math Functions

• Rnd -- needs to be preceded by call to Randomize
• Int(x) -- truncates beyond decimal point
• Round(x) -- rounds to nearest whole number

7
Writing Functions Subroutines

• Functions
• Function FunctionName(arg1,arg2, . . . )
• . . .
• End Function
• Subroutines
• Sub SubroutineName(arg1, arg2, . . . )
• . . .
• End Sub