i want to get the index of all string '/jk' from the string 'ujj/jkiiiii/jk' using JavaScript and match function.I am able to find all string but when i am using / ,it is showing error.

If you want to get an array of positions of '/jk' in a string you can either use regular expressions:

var str = 'ujj/jkiiiii/jk'
var re = /\/jk/g
var indices = []
var found
while (found = re.exec(str)) {
    indices.push(found.index)
}

Here /\/jk/g is a regular expression that matches '/jk' (/ is escaped so it is \/). Learn regular expressions at http://regexr.com/.

Or you can use str.indexOf(), but you'll need a loop anyway:

var str = 'ujj/jkiiiii/jk'
var substr = '/jk'
var indices = []
var index = 0 - substr.length
while ((index = str.indexOf(substr, index + substr.length)) != -1) {
    indices.push(index)
}

The result in both cases will be [3, 11] in indices variable.

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