/**
 * addErrorMessage
 * @param {domElement} element 
 * @param {string} error message 
 */
wFORMS.behaviors.validation.instance.prototype.addErrorMessage = function(element, message) {
	
	// we'll need an id here.
	if (!element.id) element.id = wFORMS.helpers.randomId(); 
	
	// Prepare error message
	var txtNode = document.createTextNode(message);
	
	// Find error message placeholder.
	var p = document.getElementById(element.id + this.behavior.ERROR_PLACEHOLDER_SUFFIX);
	if(!p) { // create placeholder.
		p = document.createElement("div"); 
		p.setAttribute('id', element.id + this.behavior.ERROR_PLACEHOLDER_SUFFIX);
		if(element.tagName=="TR") {
			p = (element.getElementsByTagName('TD')[0]).appendChild(p);
		} else {		
			p = element.parentNode.insertBefore(p,element);
		}
	}
	// Finish the error message.
	p.appendChild(txtNode);
	base2.DOM.bind(p);  
	p.addClass(this.behavior.styling.errorMessage);							
}