function basename (path, suffix) {
    // Returns the filename component of the path  
    // 
    // version: 910.820
    // discuss at: http://phpjs.org/functions/basename
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Ash Searle (http://hexmen.com/blog/)
    // +   improved by: Lincoln Ramsay
    // +   improved by: djmix
    // *     example 1: basename('/www/site/home.htm', '.htm');
    // *     returns 1: 'home'
    // *     example 2: basename('ecra.php?p=1');
    // *     returns 2: 'ecra.php?p=1'
    var b = path.replace(/^.*[\/\\]/g, '');
    
    if (typeof(suffix) == 'string' && b.substr(b.length-suffix.length) == suffix) {
        b = b.substr(0, b.length-suffix.length);
    }
    
    return b;
}

function dirname (path) {
    // Returns the directory name component of the path  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/dirname
    // +   original by: Ozh
    // +   improved by: XoraX (http://www.xorax.info)
    // *     example 1: dirname('/etc/passwd');
    // *     returns 1: '/etc'
    // *     example 2: dirname('c:/Temp/x');
    // *     returns 2: 'c:/Temp'
    // *     example 3: dirname('/dir/test/');
    // *     returns 3: '/dir'
    
    return path.replace(/\\/g,'/').replace(/\/[^\/]*\/?$/, '');
}

function pathinfo (path, options) {
    // Returns information about a certain string  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/pathinfo
    // +   original by: Nate
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    improved by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: Inspired by actual PHP source: php5-5.2.6/ext/standard/string.c line #1559
    // %        note 1: The way the bitwise arguments are handled allows for greater flexibility
    // %        note 1: & compatability. We might even standardize this code and use a similar approach for
    // %        note 1: other bitwise PHP functions
    // %        note 2: PHP.JS tries very hard to stay away from a core.js file with global dependencies, because we like
    // %        note 2: that you can just take a couple of functions and be on your way.
    // %        note 2: But by way we implemented this function, if you want you can still declare the PATHINFO_*
    // %        note 2: yourself, and then you can use: pathinfo('/www/index.html', PATHINFO_BASENAME | PATHINFO_EXTENSION);
    // %        note 2: which makes it fully compliant with PHP syntax.
    // -    depends on: dirname
    // -    depends on: basename
    // *     example 1: pathinfo('/www/htdocs/index.html', 1);
    // *     returns 1: '/www/htdocs'
    // *     example 2: pathinfo('/www/htdocs/index.html', 'PATHINFO_BASENAME');
    // *     returns 2: 'index.html'
    // *     example 3: pathinfo('/www/htdocs/index.html', 'PATHINFO_EXTENSION');
    // *     returns 3: 'html'
    // *     example 4: pathinfo('/www/htdocs/index.html', 'PATHINFO_FILENAME');
    // *     returns 4: 'index'
    // *     example 5: pathinfo('/www/htdocs/index.html', 2 | 4);
    // *     returns 5: {basename: 'index.html', extension: 'html'}
    // *     example 6: pathinfo('/www/htdocs/index.html', 'PATHINFO_ALL');
    // *     returns 6: {dirname: '/www/htdocs', basename: 'index.html', extension: 'html', filename: 'index'}
    // *     example 7: pathinfo('/www/htdocs/index.html');
    // *     returns 7: {dirname: '/www/htdocs', basename: 'index.html', extension: 'html', filename: 'index'}
    // Working vars
    var opt = '', optName='', tmp_arr = {}, cnt = 0, i=0;
    var have_basename = false, have_extension = false, have_filename = false;

    // Input defaulting & sanitation
    if (!path) {return false;}
    if (!options) {options = 'PATHINFO_ALL';}

    // Initialize binary arguments. Both the string & integer (constant) input is
    // allowed
    var OPTS = {
        'PATHINFO_DIRNAME': 1,
        'PATHINFO_BASENAME': 2,
        'PATHINFO_EXTENSION': 4,
        'PATHINFO_FILENAME': 8,
        'PATHINFO_ALL': 0
    };
    // PATHINFO_ALL sums up all previously defined PATHINFOs (could just pre-calculate)
    for (optName in OPTS) {
        OPTS.PATHINFO_ALL = OPTS.PATHINFO_ALL | OPTS[optName];
    }
    if (typeof options !== 'number') { // Allow for a single string or an array of string flags
        options = [].concat(options);
        for (i=0; i < options.length; i++) {
            // Resolve string input to bitwise e.g. 'PATHINFO_EXTENSION' becomes 4
            if (OPTS[options[i]]) {
                options = options | OPTS[options[i]];
            }
        }
    }

    // Internal Functions
    var __getExt = function (path) {
        var str  = path+'';
        var dotP = str.lastIndexOf('.')+1;
        return str.substr(dotP);
    };


    // Gather path infos
    if (options & OPTS.PATHINFO_DIRNAME) {
        tmp_arr.dirname = this.dirname(path);
    }

    if (options & OPTS.PATHINFO_BASENAME) {
        if (false === have_basename) {
            have_basename = this.basename(path);
        }
        tmp_arr.basename = have_basename;
    }

    if (options & OPTS.PATHINFO_EXTENSION) {
        if (false === have_basename) {
            have_basename = this.basename(path);
        }
        if (false === have_extension) {
            have_extension = __getExt(have_basename);
        }
        tmp_arr.extension = have_extension;
    }

    if (options & OPTS.PATHINFO_FILENAME) {
        if (false === have_basename) {
            have_basename = this.basename(path);
        }
        if (false === have_extension) {
            have_extension = __getExt(have_basename);
        }
        if (false === have_filename) {
            have_filename  = have_basename.substr(0, (have_basename.length - have_extension.length)-1);
        }

        tmp_arr.filename = have_filename;
    }


    // If array contains only 1 element: return string
    cnt = 0;
    for (opt in tmp_arr){
        cnt++;
    }
    if (cnt == 1) {
        return tmp_arr[opt];
    }

    // Return full-blown array
    return tmp_arr;
}



function declarVarImg(tab){
	Images = tab;
}

function changePics(direct){
		var currentImg = pathinfo(document.getElementById('current').src, 'PATHINFO_BASENAME');
		var pos = positionImages(currentImg);
	if(direct == 1){
		if(pos != 0){
			var newpos = pos-1;
			document.getElementById('current').src = Images[newpos];
		}
	}
	if(direct == 2){
		if(pos < (Images.length)-1){
			var newpos = pos+1;
			document.getElementById('current').src = Images[newpos];
		}
	}
	
	if(direct != 1 && direct != 2){
		var pathImg = document.getElementById(direct).src;
			document.getElementById('current').src = pathImg;
	}
}

function positionImages(value){
	for(var i=0; i < Images.length; i++){
		if(pathinfo(Images[i], 'PATHINFO_BASENAME') == value){
			return i;
		}
	}
}