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How to extract a specific text from a string. The hard part is the desired text changes periodically

I have an HTML document which contains this text somewhere in it
function deleteFolder() {
var mailbox = "CN=John Urban,OU=Sect-1,DC=TestServer ,DC=acme,DC=com";
var path = "/Inbox/";
//string of interest: "CN=John Urban,OU=Sect-1,DC=TestServer ,DC=acme,DC=com"
I just want to extract this text and store it in a variable in C#. My problem is that string of interest will slightly change each time the page is loaded, something like this:
"CN=John Urban,OU=Sect-1,DC=TestServer ,DC=acme,DC=com"
"CN=Jane Doe,OU=Sect-1,DC=TestServer ,DC=acme,DC=com"
etc....
How do I extract that ever changing string, without regular expression?

Is it always a function deleteFolder() which has its first line as var mailbox = "somestring"? And you are interested in somestring?
Based on the requirements you told us, could just search your string containing the HTML for var mailbox =" and then the next " and take all text between these two occurrences.
var htmlstring= "..."; //
var i1 = htmlstring.IndexOf("var mailbox = \"");
var i2 = i1 >= 0 ? htmlstring.IndexOf("\"", i1+15) : -1;
var result = i2 >= 0 ? htmlstring.Substring(i1+15, i2-(i1+15)): "not found";
VERY, VERY ugly, not maintainable, but without more information, I can't do any better. However Regex would be much nicer!

Replacing Stings, Index (-1) value must be greater or equal to zero.?

I'm getting the following error in my app's script when replacing strings in a template file to generate reports.
Index (-1) value must be greater or equal to zero.
The function is listed bellow.
/**
* Search a String in the document and replaces it with the generated newString, and sets it Bold
*/
function replaceString(doc, String, newString) {
var ps = doc.getParagraphs();
for(var i=0; i<ps.length; i++) {
var p = ps[i];
var text = p.getText();
//var text = p.editAsText();
if(text.indexOf(String) >= 0) {
//look if the String is present in the current paragraph
//p.editAsText().setFontFamily(b, c, DocumentApp.FontFamily.COMIC_SANS_MS);
p.editAsText().replaceText(String, newString);
// we calculte the length of the string to modify, making sure that is trated like a string and not another ind of object.
var newStringLength = newString.toString().length;
// if a string has been replaced with a NON empty space, it sets the new string to Bold,
Logger.log([newString,newStringLength]);
if (newStringLength > 0) {
// re-populate the text variable with the updated content of the paragraph
text = p.getText();
Logger.log(text);
p.editAsText().setBold(text.indexOf(newString), text.indexOf(newString) + newStringLength - 1, true);
}
}
}
}
When it errors out
[newString,newStringLength] = [ The Rev Levels are at ZGS 003 on the electric quality standard. The part has a current change to ZGS 005!,108]
Does anyone have any suggestions?
Thanks in advance,
Michael

You are not handling the case where the string isnt there. Thus indexOf returns -1 and you use that. Also dont use reserved words like String for variable names.

Regex split string and check if string is of type

Aanval op Vlemis (499|453) C44
This is what the string looks like. Though it's actually like this: "Aanval op variable (variable) variable
What I want to do is 1: get the coordinates (I already have this), 2 get Vlemis (first variable), get C44 (third variable) and check to see if the string is of this type.
My code:
$("#commands_table tr.nowrap").each(function(){
var text = $(this).find("input[id*='editInput']").val();
var attackername= text.match(/(?=op)[\s|\w]*(?=\()/);
var coordinates = text.match(/\(\d{1,3}\|\d{1,3}\)/);
});
Coordinates works, attackername however doesn't.
Html:
<span id="labelText[6]">Aanval op Vlemis (499|453) C44</span>

You should use one regex to take everything :
var parts = text.match(/(\w+)\s*\((\d+)\|(\d+)\)\s*(\w+)/).slice(1);
This builds
["Vlemis", "499", "453", "C44"]
If you're not sure the string is valid, test like this :
var parts = text.match(/(\w+)\s*\((\d+)\|(\d+)\)\s*(\w+)/);
if (parts) {
parts = parts.slice(1);
// do things with parts
} else {
// no match, yell at the user
}

how to format data displayed in a column

im trying to find if there is any javascript to format a string for display, so for exam "1234"- or any string over length 2- would become 12** i know there is a replace method but not sure how this would work. any suggestions welcome. thanks much

Assuming you want to mask the equivalent number of characters you can replicate * length - 2 times & append the 1st 2 characters of the original string;
var str = "123456";
var numCharsToKeep = 2;
if (str.length > numCharsToKeep)
str = str.substr(0, numCharsToKeep) + Array(str.length - numCharsToKeep + 1).join("*")
== "12******"

Parse HTML source for dollar amounts then set highest amount as var

I need a JavaScript function that will parse the HTML source of the page from which it is called as an external script, retrieve any dollar amounts in the source, and set the highest dollar amount to a JavaScript variable.
So for instance, if the page contains the text, "Your product is $40.32 and tax is $4.50, your total is $44.82.", the JS should parse those values and set $44.82 to "var total" as the highest amount. Possible?

Thanks based on the tips I wrote this, which works. Hopefully yours or my solution will help others:
var dochtml = document.getElementsByTagName('body')[0].innerHTML;
dochtml = dochtml.replace(/(\r\n|\n|\r)/gm,"");
var price_array = new Array;
var pattmatch = /(\$(([0-9]{0,1})?.[0-9]{1,2}))|(\$([1-9]{1}[0-9]{0,2}([,][0-9]{3})*)(.[0-9]{1,2})?)/gi;
price_array = dochtml.match(pattmatch);
if (price_array) {
for (var i=0; itotal || !total) {
var total=price_array[i];
}
}
document.write(total);
}

You can grab the HTML of the current document from the Javascript by grabbing the document's innerHtml, something like:
document.getElementsByTagName('html')[0].innerHTML
Then you can pull out all the currency values with a regular expression, something like:
((\$(([0-9]{0,1})?\.[0-9]{1,2}))|(\$([1-9]{1}[0-9]{0,2}([,][0-9]{3})*)(\.[0-9]{1,2})?))
Just loop through all the matches and every time the current match is greater than the value in total, set total to the current match.
Disclaimer: That regex was pulled from the community on http://gskinner.com/RegExr/ and I can't promise you it's 100% fullproof.

Take a look at this question here, which demonstrates how to extract numbers from a String: Javascript extracting number from string
Try this:
// get all content from page
var content = document.body.innerHTML;
// create an array of all dollar amounts in the content
arrayNum = content.match(/\$[0-9]+\.[0-9]+/g);
// display array of numbers
console.info(arrayNum);
var high = 0;
for(var i = 0; i < arrayNum.length; i++) {
// remove the dollar sign and cast the string to a float
arrayNum[i] = parseFloat(arrayNum[i].substring(1));
// get the high value - O(n) operation
high = ( (arrayNum[i]) > high ) ? arrayNum[i] : high;
}
alert("High value = " high);