Question

im trying to parse the following string;

"data[Product][0][fieldname]"

i need to be able to change the “[0]” part to a number, the “data[Product]” wont change while the “[fieldname]” will change.

im not sure how to do it with javascript but have an rough idea.

all i have which is wrong, is below but since [0] varies each time it doesnt work;

name="data[Product][0][fieldname]";
name.replace('[0]', '['+newrowid+']'

Jsfiddle;
http://jsfiddle.net/fuzzy_dunlop/8WKcs/

Answer 1

Use a regexp:

var a = "data[Product][0][fieldname]";
var re = /(.*\[.*\]\[)(.*)(\]\[.*\])/gi;  

newstr = a.replace(re, "$1" + "YourString" + "$3");  
document.write("Now: " + newstr); 

Example code: http://jsfiddle.net/NKbd9/1/