VBScript InStr Function
InStr
The InStr Function returns the first occurrence of one string within another string. The search happens from left to right.
Syntax
InStr([start,]string1,string2[,compare])
Description
Start, an Optional Parameter. Specifies the starting position for the search. The search begins at the first position from left to right.
String1, a Required Parameter. String to be searched.
String2, a Required Parameter. String against which String1 is searched.
Compare, an Optional Parameter. Specifies the String Comparison to be used. It can take the below mentioned values −
0 = vbBinaryCompare - Performs Binary Comparison(Default)
1 = vbTextCompare - Performs Text Comparison
Example
<!DOCTYPE html> <html> <body> <script language = "vbscript" type = "text/vbscript"> var = "Microsoft VBScript" document.write("Line 1 : " & InStr(1,var,"s") & "<br />") document.write("Line 2 : " & InStr(7,var,"s") & "<br />") document.write("Line 3 : " & InStr(1,var,"f",1) & "<br />") document.write("Line 4 : " & InStr(1,var,"t",0) & "<br />") document.write("Line 5 : " & InStr(1,var,"i") & "<br />") document.write("Line 6 : " & InStr(7,var,"i") & "<br />") document.write("Line 7 : " & InStr(var,"VB")) </script> </body> </html>
When you save it as .html and execute it in Internet Explorer, then the above script will produce the following result −
Line 1 : 6 Line 2 : 0 Line 3 : 8 Line 4 : 9 Line 5 : 2 Line 6 : 16 Line 7 : 11