JavaScript - Check If Cookie Exists

Hello,

Really need some help with this code i found online to check to see if a page exists. i am kind of new to Javascript and to have this working would really help me out!

Here is the code :

Code:

<script language="javascript">

var url = "http://www.google.com";

checkUrl(url);

function checkUrl(url) {
var request = false;
if (window.XMLHttpRequest) {
request = new XMLHttpRequest;
} else if (window.ActiveXObject) {
request = new ActiveXObject("Microsoft.XMLHttp");
}

if (request) {
    request.open('GET', url, true);
     if (request.status == 200) {   //FAILING ON THIS LINE ("Unspecified Error")
       alert ("File does exist");
     }
}
alert("File does not exist");
}</script>

It seems to be failing on the .status line and it returns an Unspecified Error in the debugger.

I am using IE9 if that makes any difference. I have also tried amending the IF statement to include the readyState == 4, i dont get the error, but it doesn't work as planned.

Really appreciate any help.

SJG

Greetings,

If I have a form like so:
Code:

<form>
  <input type="text" />
</form>

How can I check if the input exists using DOM 0?

Code:

while (document.forms[0].elements[0].exists){
 ...do something
}

I guess that I could assign a default value and check for something in
"document.forms[0].elements[0].value" but that is not the approach I wish to take.

I need to loop through all of the elements of a form until there are no more regardless of ID/name/value, am I thinking about this wrong?

I'm making a table that is dynamically populated from XML data. One of the columns refers to an XML tag that is NOT required (hence the tag does not exist in every XML entry). How do I write a statement (if, else, or any other?) that says - check for the tag, if the tag exists, write the tag's data, if the tag does NOT exist, write "n/a".

Here's the code:

Thanks!

[CODE]
<script type="text/javascript">
if (window.XMLHttpRequest)
{
xhttp=new window.XMLHttpRequest();
}
else // Internet Explorer 5/6
{
xhttp=new ActiveXObject("Microsoft.XMLHTTP");
}




xhttp.open("GET","http://www.mysite.com/file.xml",false);
xhttp.send("");
xmlDoc=xhttp.responseXML;


document.write("<table border='0' style='font-family:Arial, Helvetica, sans-serif; font-size:11px; color:#333333; border:#333333 1px solid; text-align:center' cellpadding='5' cellspacing='0'>");
document.write("<tr><td style='border-bottom:#333333 1px solid'><strong>Type</strong></td><td style='border-bottom:#333333 1px solid'><strong>Name</strong></td><td style='border-bottom:#333333 1px solid'><strong>Details</strong></td><td style='border-bottom:#333333 1px solid'><strong>Code<br>(if applicable)</strong></td><td style='border-bottom:#333333 1px solid'><strong>Start Date</strong></td><td style='border-bottom:#333333 1px solid'><strong>End Date</strong></td></tr>");



var x=xmlDoc.getElementsByTagName("link");
for (i=0;i<x.length;i++)
{
document.write("<tr><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("type")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("name")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("description")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("code")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("startdate")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("enddate")[0].childNodes[0].nodeValue);
document.write("</td></tr>");
}
document.write("</table>");
</script>
[CODE]

Thanks,
M8AL

Hi All,

I am not an expert in Javascript.

Can I detect if 1 or more sessions of a website are open?

for example, if a session with port 7005 is open like this one below, then I want to assign the next port to this user in the second window of browser

http://90.97.8.0:7005/maximo/webclient/login/login.jsp

the next IE window should appear like this:

http://90.97.8.0:7006/maximo/webclient/login/login.jsp

or
http://90.97.8.0:7007/maximo/webclient/login/login.jsp

Please advise.

Thanks

Yasar

is there a way to do this with javascript ?

Code:

var fID = document.getElementById('email2');

I'm making a table that is dynamically populated from XML data. One of the columns refers to an XML tag that is NOT required (hence the tag does not exist in every XML entry). How do I write a statement (if, else, or any other?) that says - check for the tag, if the tag exists, write the tag's data, if the tag does NOT exist, write "n/a".

Here's the code:

[CODE]
<script type="text/javascript">
if (window.XMLHttpRequest)
{
xhttp=new window.XMLHttpRequest();
}
else // Internet Explorer 5/6
{
xhttp=new ActiveXObject("Microsoft.XMLHTTP");
}




xhttp.open("GET","http://www.mysite.com/file.xml",false);
xhttp.send("");
xmlDoc=xhttp.responseXML;


document.write("<table border='0' style='font-family:Arial, Helvetica, sans-serif; font-size:11px; color:#333333; border:#333333 1px solid; text-align:center' cellpadding='5' cellspacing='0'>");
document.write("<tr><td style='border-bottom:#333333 1px solid'><strong>Type</strong></td><td style='border-bottom:#333333 1px solid'><strong>Name</strong></td><td style='border-bottom:#333333 1px solid'><strong>Details</strong></td><td style='border-bottom:#333333 1px solid'><strong>Code<br>(if applicable)</strong></td><td style='border-bottom:#333333 1px solid'><strong>Start Date</strong></td><td style='border-bottom:#333333 1px solid'><strong>End Date</strong></td></tr>");



var x=xmlDoc.getElementsByTagName("link");
for (i=0;i<x.length;i++)
{
document.write("<tr><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("type")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("name")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("description")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("code")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("startdate")[0].childNodes[0].nodeValue);
document.write("</td><td style='border-bottom:#333333 1px solid'>");
document.write(x[i].getElementsByTagName("enddate")[0].childNodes[0].nodeValue);
document.write("</td></tr>");
}
document.write("</table>");
</script>
[CODE]

Thanks,
M8AL

Is there any way to check if exists a cookie from a domain2 in domain1?

The purpose here is if the cookie from domain 2 exists then do an action in domain 1.

For example:
Erase cookie or do an action.

Hello everyone. I am trying to put together a browser based game which uses javascript and cookies, and am looking for help with one of it's functions.

I need a script which checks a cookie value, then displays a certain image, depending on what that value is. So, if the value is 50, it displays one, if it's 60 it display another one etc.

What script would I use?

Hello, i wrote this code to open a page if doesn't exist a cookie but it doesn't open the page do you know where I wrong?
Thank you !

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml">
<head> 
<title> HTML </title> 
</head> 
<body>
<script type="text/javascript">

function CookieLeggi(CookieNome)
	{
	if (CookieNome.length==0) return null;
	var PosizioneIniziale = document.cookie.indexOf(CookieNome+"=");
		if (PosizioneIniziale == -1) return null;
		PosizioneIniziale += CookieNome.length+1;  
	var PosizioneFinale = document.cookie.indexOf(";",PosizioneIniziale);
		if (PosizioneFinale == -1) PosizioneFinale = document.cookie.length; 
	return unescape(document.cookie.substring(PosizioneIniziale,PosizioneFinale));
	}

function CookieScrivi(name,value,expiresUdM,expires,path,domain,secure)
	{
	if (!name || !value) { return false }  
	if ((expiresUdM && expires) && (expiresUdM!='GMT')) {
		var ExpiresMillisec = ExpiresDate = Oggi = new Date();
		switch (expiresUdM) {    // calcola i JS-millisecondi del momento di scadenza
			case "anni":    ExpiresMillisec=Oggi.getTime()+expires*365*24*60*60*1000; break;
			case "mesi":    ExpiresMillisec=Oggi.getTime()+expires*31*24*60*60*1000; break;
			case "giorni":  ExpiresMillisec=Oggi.getTime()+expires*24*60*60*1000; break;
			case "ore":     ExpiresMillisec=Oggi.getTime()+expires*60*60*1000; break;
			case "minuti":  ExpiresMillisec=Oggi.getTime()+expires*60*1000; break;
			case "secondi": ExpiresMillisec=Oggi.getTime()+expires*1000; break;
			default:        ExpiresMillisec=Oggi.getTime()+expires; 
			}
		ExpiresDate.setTime(ExpiresMillisec);   
		expires = ExpiresDate.toGMTString(); }  
	secure = (secure=="1" || secure==1 || secure=="secure") ? 1 : "";
	document.cookie = name + "=" +escape(value) +
	        ( (expiresUdM && expires) ? "; expires=" + expires : "") +
	        ( (path) ? "; path=" + path : "") + 
	        ( (domain) ? "; domain=" + domain : "") +
	        ( (secure) ? "; secure" : "");

	if (CookieLeggi(name)==null && secure!=1) { return false; } else { return true; }
	}
</script>

<script type="text/javascript">
if (CookieLeggi(liveads) == "null")
{
window.open("http://www.google.com", "Google");
CookieScrivi(liveads, adsm, ore, 12, /, .localhost, 1);
}
else
{
break;
}
</script>
</body>
</html>

Hi everyone, I am using a jQuery cookie script to set the cookie of some elements on my website. One of the problems is that I need the cookie to not expire after one day, I need it to expire after a while (I'm going to start off with a year).

Here's my script, the red part is what I've been editing.

Code:

/**
 * Cookie plugin
 *
 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 */

/**
 * Create a cookie with the given name and value and other optional parameters.
 *
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Set the value of a cookie.
 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secu  true });
 * @desc Create a cookie with all available options.
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Create a session cookie.
 * @example $.cookie('the_cookie', null);
 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
 *       used when the cookie was set.
 *
 * @param String name The name of the cookie.
 * @param String value The value of the cookie.
 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
 *                             when the the browser exits.
 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
 *                        require a secure protocol (like HTTPS).
 * @type undefined
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */

/**
 * Get the value of a cookie with the given name.
 *
 * @example $.cookie('the_cookie');
 * @desc Get the value of a cookie.
 *
 * @param String name The name of the cookie.
 * @return The value of the cookie.
 * @type String
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */
jQuery.cookie = function(name, value, options) {
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
 				date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000 * 365)); 
            } else {
                date = options.expires;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        // CAUTION: Needed to parenthesize options.path and options.domain
        // in the following expressions, otherwise they evaluate to undefined
        // in the packed version for some reason...
        var path = options.path ? '; path=' + (options.path) : '';
        var domain = options.domain ? '; domain=' + (options.domain) : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};

On this webpage
http://www.corkdiscos.com/testimonials.html

i have a like button.
when a user clicks like a comment box appears.
when i unlike the button the comment box disappears

this is ok but when a user has already liked the facebook page and comes to my webpage
the comment box does not show.

so im looking for a piece of javascript to check if a user has like the button on my page and if so to show the comment box.

please check my source code of the website http://www.corkdiscos.com/testimonials.html to see what i have so far.

any help would be greatly appreciated

Hi guys.

I'm working a bunch of pre existing code on a CMS. Just after a quick fix. Doing a show/hide thing on a particular div somewhere on the page depending if a checkbox is ticked or not.

Currently there is 3 checkboxes that are dynamically added through the CMS.

Here's simplified version of the form:

Code:

<form id="simplesearch" name="simplesearch">
<input type="checkbox"   onclick='showhidefield(this.value)' name="meta_data_array_search_criteria[custom_profile_type][]" value="5"  class="input-checkboxes" />
<input type="checkbox"   onclick='showhidefield(this.value)' name="meta_data_array_search_criteria[custom_profile_type][]" value="4"  class="input-checkboxes" />
</form>

And here's the javascript I was playing with.
Code:

function showhidefield(id)
{
   if(document.simplesearch.meta_data_array_search_criteria[custom_profile_type][''].checked) {
      document.getElementById("profile_fields_wrapper_" + id).style.visibility = "visible";
   }
   else
   {
      document.getElementById("profile_fields_wrapper_" + id).style.visibility = "hidden";
   }
}

Problem I'm having is how do i do a check to see if those checkboxes are checked in the javascript with those name arrays? How do i separate them? 'm guessing I have to loop through them or something?Hopefully that make senses - it's late here and I'm losing the plot Any pointers would be gratefully welcomed

I am tasked with making a function that can accept many different items and return whether or not they exist.

Currently I am struggling on seeing if an object that holds all the methods for a button exists. I thought I could pass in the string name of the object then do a $('buttonObject').length >0 in the 'Exists' method to see if it was created yet. However this will never return true, and I cannot pass in the object into my exists function without it being created yet (throws error). So something like Exists(buttonObject) won't work, I'll have to pass in the string name of it (Exists('buttonObject')) or something else (I'm new to JS).

So how do I go about testing whether or not it exists if I cannot pass in buttonObject, without quotes?

HI all. How do I determine whether a variable exists in a form. I have a form called "theForm". I want to determine whether the variable "THIRD_PARTY" exists in the form and if it has been set.
Tracy