function overThread(obj,col) {
	obj.style.backgroundColor = col; 
	obj.firstChild.style.color = '#FFFFFF'; 
	obj.firstChild.nextSibling.style.color = '#FFFFFF';
}

function outThread(obj,col) {
	obj.style.backgroundColor = '';
	obj.firstChild.style.color = col;
	obj.firstChild.nextSibling.style.color='#000000';
}