Add attributes to Element

index.js

/**
 * Pass an object of attributes and their values and the element to modify
 * @param {object} attributes Key-value pairs consisting of the attribute, and it's value
 * @param {DOM Elem} element  A queried or generated dom element
 */
function addAttributesToElement(attributes, element) {

	for(var key in attributes) {
		 if (attributes.hasOwnProperty(key)) {
		 	var attrKey = document.createAttribute(key);
		 	attrKey.value = attributes[key];

		 	element.setAttributeNode(attrKey);

	    }
	}

	return element;
}

// usage

var row = addAttributeToElement({'class' : 'gallery-page', 'id' : 'test'}, document.createElement('div'));