how can i use a regular expression in java script to get a value from page source cod

how can i use a regular expression in java script to get a value from page source cod - Printable Version

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+--- Thread: how can i use a regular expression in java script to get a value from page source cod (/Thread-how-can-i-use-a-regular-expression-in-java-script-to-get-a-value-from-page-source-cod)

how can i use a regular expression in java script to get a value from page source cod - mooooon - 06-08-2019

here is the function from the source code

Code:
function dosubmit()
  {
    if (getObj("Frm_Username").value == "")
    {
      getObj("errmsg").innerHTML = "Username cannot be empty.";
      getObj("myLayer").style.visibility = "visible" ;
      return;
    }
    else
    {
      getObj("LoginId").disabled = true;
      getObj("Frm_Logintoken").value = "3";
      document.fLogin.submit();
    }
  }

i want to get the value of getObj("Frm_Logintoken") as i can't pull the value from #Frm_Logintoken

using

Code:
document.getElementById("#Frm_Logintoken")

this gives me null

because Frm_Logintoken only gets it's value when i click submit .

Code:
<input type="hidden" name="Frm_Logintoken" id="Frm_Logintoken" value="">

full page code

i found this online

Code:
/getObj("Frm_Logintoken").value = "(.*)";/g

but when i run it ... it gives me the same line again ! it's full code

another regular expression i found but don't even know how to use it

Quote:Example of a regular expression to search: before_egrep='N1:getObj("Frm_Logintoken").value = "(\w+)"'

Here, N1 is assigned the value of the back reference - the expression in parentheses. \w + denotes the main compound characters, this is a synonym for "[_[:alnum:]]". Once again - pay attention to the brackets - this is the back link. At the same time, there are also parentheses in the source code fragment - they need to be escaped

i am trying to make an auto login script that works in the background like it

doesn't show the user the login form page but the only the page after it

and i have found this code online too but don't know what's about it contains xhr .

the line that Attracted my attention is

Code:
/getObj\("Frm_Logintoken"\).value = "(.*)";/g

when i run it ... it gives me the line again !

some notes :

i have tried

Code:
document.getElementById("Frm_Logintoken").value

but it gives me empty ""
because

Quote:Frm_Logintoken only gets it's value when i click submit .

the page will not even accept the correct password if the Frm_Logintoken token value isn't the same as one in the page.

the Frm_Logintoken is a token generated by the page and it basically increment by one on each successful login.