function Get_Cookie( check_name ) {
	// first we'll split this cookie up into name/value pairs
	// note: document.cookie only returns name=value, not the other components
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f
	var i = '';
	
	for ( i = 0; i < a_all_cookies.length; i++ )
	{
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );
		
		
		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');
	
		// if the extracted name matches passed check_name
		if ( cookie_name == check_name )
		{
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found ) 
	{
		return null;
	}
}

/*
only the first 2 parameters are required, the cookie name, the cookie
value. Cookie time is in milliseconds, so the below expires will make the 
number you pass in the Set_Cookie function call the number of days the cookie
lasts, if you want it to be hours or minutes, just get rid of 24 and 60.

Generally you don't need to worry about domain, path or secure for most applications
so unless you need that, leave those parameters blank in the function call.
*/
function Set_Cookie( name, value, expires, path, domain, secure ) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	// if the expires variable is set, make the correct expires time, the
	// current script below will set it for x number of days, to make it
	// for hours, delete * 24, for minutes, delete * 60 * 24
	if ( expires )
	{
		expires = expires * 1000 * 60 * 60 * 24;
	}
	//alert( 'today ' + today.toGMTString() );// this is for testing purpose only
	var expires_date = new Date( today.getTime() + (expires) );
	//alert('expires ' + expires_date.toGMTString());// this is for testing purposes only

	document.cookie = name + "=" +escape( value ) +
		( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + //expires.toGMTString()
		( ( path ) ? ";path=" + path : "" ) + 
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}

// this deletes the cookie when called
function Delete_Cookie( name, path, domain ) {
	if ( Get_Cookie( name ) ) document.cookie = name + "=" +
			( ( path ) ? ";path=" + path : "") +
			( ( domain ) ? ";domain=" + domain : "" ) +
			";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

/*
Script Name: Your Computer Information
Author: Harald Hope, Website: http://TechPatterns.com/
Script Source URI: http://TechPatterns.com/downloads/browser_detection.php
Version: 1.1.4
Copyright (C) 17 October 2009

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Get the full text of the GPL here: http://www.gnu.org/licenses/gpl.txt

This script requires the Full Featured Browser Detection and the Javascript Cookies scripts
to function.
You can download them here.
http://TechPatterns.com/downloads/browser_detection_php_ar.txt
http://TechPatterns.com/downloads/javascript_cookies.txt

Please note: this version requires the php browser_detection script version 5.0.0 or
newer, because of the new full return of arrays $moz_array and $webkit_array as keys
10 and 11
*/

/*
If your page is XHMTL 1 strict, you have to
put this code into a js library file or your
page will not validate
*/
function client_data(info)
{
	if (info == 'width')
	{
		width_height_html = '<h4  class="right-bar">Current Screen Resolution</h4>';
		width = (screen.width) ? screen.width:'';
		height = (screen.height) ? screen.height:'';
		// check for windows off standard dpi screen res
		if (typeof(screen.deviceXDPI) == 'number') {
			width *= screen.deviceXDPI/screen.logicalXDPI;
			height *= screen.deviceYDPI/screen.logicalYDPI;
		} 
		var widRes = " -- <B><Font color=ORANGE>WARNING - A higher resolution is recommended</font></b>";
		if (width >= 800) {
			widRes = " -- <B><Font color=GREEN>PASSED</font></b>";
		}
		width_height_html += '<p class="right-bar">' + width + " x " +
			height + " pixels " + widRes + "</p>";
		(width && height) ? document.write(width_height_html):'';
	}
	else if (info == 'js' )
	{
		document.write('<p class="right-bar">JavaScript is enabled. -- <B><Font color=GREEN>PASSED</font></b></p>');
	}
	else if ( info == 'cookies' )
	{
		expires ='';
		Set_Cookie( 'cookie_test', 'it_worked' , expires, '', '', '' );
		string = '<h4  class="right-bar">Cookies</h4><p class="right-bar">';
		if ( Get_Cookie( 'cookie_test' ) )
		{
			string += 'Cookies are enabled -- <B><Font color=GREEN>PASSED</font></b></p>';
		}
		else {
			string += 'Cookies are disabled -- <B><Font color=RED>FAILED</font></b></p>';
		}
		document.write( string );
	}
}