JS仿iGoogle自定义首页模块拖拽特效的方法(2)

titleBar.onmousedown = function(e) {
                    var ev = e || window.event || Common.getEvent();
                    //只允许通过鼠标左键进行拖拽,IE鼠标左键为1 FireFox为0
                    if (Common.isIE && ev.button == 1 || !Common.isIE && ev.button == 0) {
                    }
                    else {
                        return false;
                    }