document.onmouseover = Mouse_on_element;
document.onmouseout = Mouse_off_element;

function Mouse_on_element() {
	if( window.event.srcElement.tagName.toUpperCase() == 'A' ) {
		savedcolor=window.event.srcElement.style.color;
		window.event.srcElement.style.color="red";
	}	
}

function Mouse_off_element() {
	if( window.event.srcElement.tagName.toUpperCase() == 'A' ) {
		window.event.srcElement.style.color=savedcolor;
	}	
}