You could extract that information with a regular expression such as
/\'\=-{0,}(satya[0-9]{0,})\'/
Live example: http://jsfiddle.net/LFZje/
The regex matches
Literal '
Literal =
Zero or more -
Starts a capture group and captures
- Literal satya
- Zero or more numbers
Ends the capture group
Literal '
Then using code such as
var regex = /\'\=-{0,}(satya[0-9]{0,})\'/g;
while( (match = regex.exec("'=--satya','=---satya1','=-----satya2'")) !== null)
{
// here match[0] is the entire capture
// and match[1] is tthe content of the capture group, ie "satya1" or "satya2"
}
See the live example more detail.