public/javascripts/yui/treeview/treeview.js
function (ev) {
        var target;
        if ((target = this._getEventTargetTdEl(ev)) && (target = this.getNodeByElement(target)) && (target = target.getToggleEl())) {
            target.className = target.className.replace(/\bygtv([lt])([mp])\b/gi,'ygtv$1$2h');
        }
    }
function (ev) {
        var target;
        if ((target = this._getEventTargetTdEl(ev)) && (target = this.getNodeByElement(target)) && (target = target.getToggleEl())) {
            target.className = target.className.replace(/\bygtv([lt])([mp])\b/gi,'ygtv$1$2h');
        }
    }
function ( ev ) { var target ; if ( ( target = this . _getEventTargetTdEl ( ev ) ) && ( target = this . getNodeByElement ( target ) ) && ( target = target . getToggleEl ( ) ) ) { target . className = target . className . replace ( / \bygtv([lt])([mp])\b / gi , 'ygtv$1$2h' ) ; } }
Event listener for mouse over events
@method _onMouseOverEvent
@private
Event listener for mouse over events