function getCookie( 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
	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;
	}
}

function setCookie( name, value, expires, path, domain, secure ) {
    // set time, it's in milliseconds
    var today = new Date();
    today.setTime( today.getTime() );
    if ( expires ) {
    expires = expires * 1000 * 60 * 60 * 24;
    }
    var expires_date = new Date( today.getTime() + (expires) );
    document.cookie = name + "=" +escape( value ) +
    ( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + 
    ( ( path ) ? ";path=" + path : "" ) + 
    ( ( domain ) ? ";domain=" + domain : "" ) +
    ( ( secure ) ? ";secure" : "" );
}
function generateId() {
    var result, i, j;
    result = '';
    for(j=0; j<32; j++) {
    if( j == 8 || j == 12|| j == 16|| j == 20)
        result = result + '-';
        i = Math.floor(Math.random()*16).toString(16).toUpperCase();
        result = result + i;
    }
    return result
} 	
var ref = document.referrer;
if(ref && ref!='') {
    var id = getCookie('idc');
    if(!id) {
       id = generateId();       
       setCookie( 'idc', id, 1, '/', '', '' );
    } 
    document.write('<img src="http://kp.hallojoe.dk/register.ashx?id=' + id + '&ref=' + escape(ref) + '" alt="" />');
}