// this function gets the cookie, if it exists
function Get_Cookie( name ) {
	
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) )
	{
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ";", len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}

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";
}

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:'';
                width_height_html += '<p class="right-bar">' + width + " x " +
                        height + " pixels</p>";
                (width && height) ? document.write(width_height_html):'';
        }
        else if (info == 'js' )
        {
                document.write('<p class="right-bar">JavaScript is enabled.</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</p>';
                }
                else {
                        string += 'Cookies are disabled</p>';
                }
                document.write( string );
        }
}