Display ads by judging the specified directory
Copy Code code as follows:
if (Location.href.indexOf ("http://www.jb51.net/codes/") >-1) {
Alert (' OK ');
}
Copy Code code as follows:
var Cts = "Bbltext";
if (Cts.indexof ("Text") >= 0)
{
Alert (the ' CTS contains the text string ');
}
indexof Usage:
Returns the character position for the first occurrence of a substring within a string object.
Strobj.indexof (substring[, StartIndex])
Parameters
Strobj
Required option. A String object or text.
SubString
Required option. The substring to find in the string object.
Starindex
Options available. An integer value that indicates the index in which to start the lookup within a String object. If omitted, it is looked up from the beginning of the string.
Description
The IndexOf method returns an integer value that indicates the starting position of the substring of the string object. If no substring is found, returns-1.
If the startindex is a negative number, the startindex is treated as zero. If it is larger than the maximum character position index, it is considered to be the largest possible index.
Performs a lookup from left to right. Otherwise, the method is the same as LastIndexOf.
Sample
The following example illustrates the use of the IndexOf method.
Copy Code code as follows:
function Indexdemo (str2) {
var str1 = "Babebibobubabebibobu"
var s = str1.indexof (STR2);
return (s);
}
for JavaScript indexof ignore case
The IndexOf function method in JavaScript returns an integer value that indicates the starting position of the substring of a string object. If no substring is found, returns-1. If the startindex is a negative number, the startindex is treated as zero. If it is larger than the maximum character position index, it is considered to be the largest possible index.
The IndexOf function performs a lookup from left to right. Otherwise, the method is the same as LastIndexOf.
The following example illustrates the use of the IndexOf function method
Copy Code code as follows:
function Indexdemo (str2) {
var str1 = "Babebibobubabebibobu"
var s = str1.indexof (STR2);
return (s);
}