var elements = document.getElementsByClassName('hasToolTip');

for(var i = 0; i < elements.length; i++) {
    elements[i].onmouseover = function (event) {
		if(!event) var event = window.event;
        var element = Event.element(event);
        if(!$(element.id + '_tooltip')) return;
        $(element.id + '_tooltip').style.display = 'block';
        $(element.id + '_tooltip').style.top = (Event.pointerY(event) + 10) + 'px';
        $(element.id + '_tooltip').style.left = (Event.pointerX(event) + 10) + 'px';
    }
    elements[i].onmousemove = function (event) {
		if(!event) var event = window.event;
        var element = Event.element(event);
        if(!$(element.id + '_tooltip')) return;
        $(element.id + '_tooltip').style.top = (Event.pointerY(event) + 10) + 'px';
        $(element.id + '_tooltip').style.left = (Event.pointerX(event) + 10) + 'px';
    }
    elements[i].onmouseout = function (event) {
		if(!event) var event = window.event;
        var element = Event.element(event);
        if(!$(element.id + '_tooltip')) return;
        $(element.id + '_tooltip').style.display = 'none';
    }
}