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richyrich · #1 May 7th, 2009, 09:52 AM

I have a JS function that seems to be working fine until a value is added to a hidden text box. The function causes no problems until a value is added to the txt_filepath textbox, which has visibility:hidden style added to it.

I think the problem is linked to the fact that the value in the textbox is in the form of \1\randomletters. I think it's the \'s that are causing the problem. How would I do a replace on them in JS?

The error I get in Firefox is AddTask is not defined.

The JS function is as follows:-

Code:

function AddTask(){
var tr_box = document.getElementById('tr_box_start1');
//alert(tr_box);
if(tr_box!=null){
document.getElementById('tr_box_start1').style.display='none';
document.getElementById('tr_box_start2').style.display='none';
}
document.getElementById('ctl00_main_content_update_progress').style.display='';
document.getElementById('update_text').innerHTML='Adding Task....';
var pcuser = document.getElementById('ctl00_hdn_pcuser').value;
var defaulttask = document.getElementById('ctl00_main_content_ddl_defaulttask').value;
if(defaulttask=='') defaulttask=0;
var visitorref = document.getElementById('ctl00_main_content_ddl_visitorref').value;
if(visitorref=='') visitorref=0;
var introref = document.getElementById('ctl00_main_content_ddl_introref').value;
if(introref=='') introref=0;
var cat = document.getElementById('ctl00_main_content_ddl_category').value;
var sendto = document.getElementById('ctl00_main_content_ddl_sendto').value;
var dtDue = document.getElementById('ctl00_main_content_txt_datedue').value;
var tmSpent = document.getElementById('ctl00_main_content_txt_timespent').value;
var title = document.getElementById('ctl00_main_content_txt_subject').value;
//alert(title);
var filepath = document.getElementById('ctl00_main_content_txt_filepath').value;
filepath=escape(filepath);
alert('filepath: '+filepath);
var note=FTB_API['ctl00_main_content_ftb_mess'].GetHtml();
//alert(note);
//return false;
TaskAdd.AddTask(pcuser,defaulttask,visitorref,introref,cat,sendto,dtDue,tmSpent,title,filepath,note,OnAddTaskComplete,OnError,OnTimeout);
}

Any ideas?

jmurrayhead · #2 May 7th, 2009, 09:57 AM

The backslash is an escape character in JS, so that could possible be causing the problem.

Here's how to replace in JS: JavaScript replace() Method

To keep the backslash in the string, simply replace it with two backslashes.

richyrich · #3 May 7th, 2009, 10:06 AM

That's what I think J, but the problem is getting the syntax right on the replace function.
This gives an error of unterminated regular expression literal

Code:

document.write(str.replace(/\/,"\\"));

If I try this:-

Code:

var str="Visit \Microsoft!";
document.write(str.replace(/\\/,\\\\)

It just returns "Visit Microsoft!" when I would expect it to return "Visit \\Microsoft!"

jmurrayhead · #4 May 7th, 2009, 10:14 AM

Try this:

Code:

document.write(str.replace(/\\/g, "\\\\");

richyrich · #5 May 7th, 2009, 10:24 AM

Nope. It doesn't work if the original string just has a single \ in it.

So, this:-

Code:

var str="Visit \\1\\Microsoft!";
document.write(str)

gives Visit \1\Microsoft!

If I do:-

Code:

var str="Visit \\1\\Microsoft!";
document.write(str.replace(/\\/g,"\\\\"));

it gives Visit \\1\\Microsoft!

If it starts with:-

Code:

var str="Visit \1\Microsoft!"

then it doesn't do a replace.

Any other ideas?

jmurrayhead · #6 May 7th, 2009, 10:32 AM

What about this:

Code:

document.write(str.replace('\\', '\\\\');

richyrich · #7 May 7th, 2009, 10:36 AM

Nope. Still doesn't work.

There must be a way of doing this, surely?

If the original string just has a single \ then it just gets rid of it.

This is very annoying..

richyrich · #8 May 7th, 2009, 11:11 AM

From what I've found it seems it's not possible to do this with Javascript.

The original string must have double slashes to do a replace.

jmurrayhead · #9 May 7th, 2009, 11:15 AM

I think I'm getting closer, R...but still getting weird results:

Code:

<script type="text/javascript"><!--

var esc = {"\\":/\\/g, n: /\n/g, t: /\t/g, r: /\r/g, b: /\x08/g, s: /\x73/g}
    var Str= "\1\randomletters";
var newStr = Str;
for(e in esc){
  newStr = newStr.replace(esc[e], "\\"+e);
}
    alert(newStr);
//-->
</script>

jmurrayhead · #10 May 7th, 2009, 11:26 AM

Hey R,

Maybe if you convert to forward slashes first:

Code:

        function back2forward(dataStr) {
            return dataStr.replace(/\\/g, "/");
        }

Then, handle the string how you need to...then when you're done, convert it back:

Code:

        function forward2back(dataStr) {
            return dataStr.replace(/\//g, "\\");
        }

I'm running out of ideas on this one..

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