function myElement(referencedElement) {
	this.referencedElement = referencedElement;
}

myElement.prototype.setElement(theElement) = function()  { // <-- undefined value error
	this.referencedElement = document.getElementById(theElement);
}

myElement.prototype.clearBorder = function () {
	if(this.referencedElement !== null) {
		this.referencedElement.style.border = "none";
	} else {
		alert("referencedElement is null for object:"+this);
	}
}