docs: function _generateId(el) {
  		var str = el.tagName + el.className + el.src + el.href + el.textContent,
  			i = str.length,
  			sum = 0;
  
  		while (i--) {
  			sum += str.charCodeAt(i);
  		}
  
  		return sum.toString(36);
  	}