/**
 * Concatenates the values of a variable into an easily readable string
 * by Matt Hackett [scriptnode.com]
 * @param {Object} x The variable to debug
 * @param {Number} max The maximum number of recursions allowed (keep low, around 5 for HTML elements to prevent errors) [default: 10]
 * @param {String} sep The separator to use between [default: a single space ' ']
 * @param {Number} l The current level deep (amount of recursion). Do not use this parameter: it's for the function's own use
 */ 
function print_r(x, max, sep, l) { 
	 
	    l = l || 0; 
	    max = max || 10; 
	    sep = sep || ' '; 
	 
	    if (l > max) { 
	        return "[WARNING: Too much recursion]\n"; 
	    } 
	 
	    var 
	        i, 
	        r = '', 
	        t = typeof x, 
	        tab = ''; 
	 
	    if (x === null) { 
	        r += "(null)\n"; 
	    } else if (t == 'object') { 
	 
	        l++; 
	 
	        for (i = 0; i < l; i++) { 
	            tab += sep; 
	        } 
	 
	        if (x && x.length) { 
	            t = 'array'; 
	        } 
	 
	        r += '(' + t + ") :\n"; 
	 
	        for (i in x) { 
	            try { 
	                r += tab + '[' + i + '] : ' + print_r(x[i], max, sep, (l + 1)); 
	            } catch(e) { 
	                return "[ERROR: " + e + "]\n"; 
	            } 
	        } 
	 
	    } else { 
	 
	        if (t == 'string') { 
	            if (x == '') { 
	                x = '(empty)'; 
	            } 
	        } 
	 
	        r += '(' + t + ') ' + x + "\n"; 
	 
	    } 
	 
	    return r; 
	 
	}; 
	var_dump = print_r;