Generate a big random float jquery/JavaScript -

this question has answer here:

• how deal big numbers in javascript [duplicate] 4 answers

i need generate 12 digit , 13 decimals float value this:

123438767411.238792938 

how can in javascript/jquery? possible generate code using javascript?

i trying this:

v1 = math.floor((math.random()*10000000000)+1); v2 = math.floor((math.random()*100000000)+1); v = v1.tostring() + "." + v2.tostring(); 

but not working!

(assuming mean in form of string, not number, because ieee 754 can't have many significant digits)

must integer part 12 digits or can 1 or 123? if can 12 digits or shorter, can be

(math.floor (math.random() * math.pow(10,12))      + (math.floor (math.random() * math.pow(10,13))        / math.pow(10,13)).tostring().substring(1)) 

---

note above have issue when decimal part turns out 0, although chance small. (then .0 part gone, although can use conditional add when so). or can treat decimal part 123 not .0000000000123 .123 , use:

(math.floor (math.random() * math.pow(10,12))      + "." + math.floor (math.random() * math.pow(10,13))) 

but depends whether care 123 becoming .123 , 1230 becoming .1230 because if care it, can .123 same .1230.

also, if want have form such 000042987017.0790946977900 well, 12 digit integer , 13 digit decimal, either can 0 padding or use this:

sample: http://jsfiddle.net/jl4t4/1/

var i, s = "";  (i = 0; < 26; i++) {     s += (i === 12) ? "." : math.floor(math.random() * 10); }