获取js内容
def get_js():
# f = open("D:/WorkSpace/MyWorkSpace/jsdemo/js/des_rsa.js",'r',encoding='UTF-8')
f = open("./yidai.js", 'r', encoding='UTF-8')
line = f.readline()
htmlstr = ''
while line:
htmlstr = htmlstr + line
line = f.readline()
return htmlstr
