//function changeSheets(whichSheet) {
//    SaveText(whichSheet);
//    if (document.styleSheets) {
//        var c = document.styleSheets.length;
//        // if (doAlerts) alert('Change to Style '+(whichSheet+1));
//        for (var i = 0; i < c - 1; i++) {
//            if (i != whichSheet) {
//                document.styleSheets[i].disabled = true;
//            } else {
//                document.styleSheets[i].disabled = false;
//            }
//        }
//    }
//}
//

var _inverted = false;
 
function invertSheets() {
	if(_inverted) {
		invertImages(0);
		DisableStyleSheet('invert');
	} else {
		invertImages(1);
		EnableStyleSheet('invert');
	}
	_inverted = !_inverted;
	$.cookie('inverted',_inverted,{expires:7,path:'/'});

    //alert(' sheet 0 diabled='+document.styleSheets[0].disabled+'\n sheet 1 diabled='+document.styleSheets[1].disabled+'\n sheet 2 diabled='+document.styleSheets[2].disabled+'\n sheet 3 diabled='+document.styleSheets[3].disabled+' \n sheet 4 diabled='+document.styleSheets[4].disabled);
    //if (document.styleSheets[3].disabled == true) {
    //    document.styleSheets[3].disabled = false;
    //    SaveInvert(1);
    //    invertImages(1);
    //} else {
    //    document.styleSheets[3].disabled = true;
    //    SaveInvert(0);
    //    invertImages(0);
    //}
}

/**
 *
 * @access public
 * @return void
 **/
function invertImages(sheet) {
    if (sheet == 1) {
        //document.getElementById('logo').src="/interface/bccfa/logo_inverse.png";
        document.getElementById('carf').src = "/interface/bccfa/carf-logo_inverse.png";
        //document.getElementById('w3c').src="/interface/bccfa/w3c-logo_inverse.png";
        //document.getElementById('nucleuslabs').src="/interface/bccfa/nucleuslabs-logo_inverse.png";
        document.getElementById('bccfa-small').src = "/interface/bccfa/bccfa-small-logo_inverse.png";
        document.getElementById('text_regular').src = "/interface/bccfa/text_regular_inverse.png";
        document.getElementById('text_big').src = "/interface/bccfa/text_big_inverse.png";
        document.getElementById('text_large').src = "/interface/bccfa/text_large_inverse.png";
        document.getElementById('text_invert').src = "/interface/bccfa/text_invert_inverse.png";
    } else {
        //document.getElementById('logo').src="/interface/bccfa/logo.png";
        document.getElementById('carf').src = "/interface/bccfa/carf-logo.png";
        //document.getElementById('w3c').src="/interface/bccfa/w3c-logo.png";
        //document.getElementById('nucleuslabs').src="/interface/bccfa/nucleuslabs-logo.png";
        document.getElementById('bccfa-small').src = "/interface/bccfa/bccfa-small-logo.png";
        document.getElementById('text_regular').src = "/interface/bccfa/text_regular.png";
        document.getElementById('text_big').src = "/interface/bccfa/text_big.png";
        document.getElementById('text_large').src = "/interface/bccfa/text_large.png";
        document.getElementById('text_invert').src = "/interface/bccfa/text_invert.png";
    }
}

/**
 *
 * @access public
 * @return void
 **/

function disableSheets() {
    var c = document.styleSheets.length;
    for (var i = 0; i < c; i++) {
        document.styleSheets[i].disabled = true;
    }
}

function SaveText(cookieValue) {
    cookieName = 'text_size';
    nDays = 7;
    var today = new Date();
    var expire = new Date();
    if (nDays == null || nDays == 0) nDays = 1;
    expire.setTime(today.getTime() + 3600000 * 24 * nDays);
    document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.toGMTString() + ";path=/";
}

function SaveInvert(cookieValue) {
    cookieName = 'invert';
    nDays = 7;
    var today = new Date();
    var expire = new Date();
    if (nDays == null || nDays == 0) nDays = 1;
    expire.setTime(today.getTime() + 3600000 * 24 * nDays);
    document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.toGMTString() + ";path=/";
}