JS禁止选中文本方法

if (typeof(element.onselectstart) != "undefined") {
// IE下禁止元素被选取
element.onselectstart = new Function("return false");
} else {
// firefox下禁止元素被选取的变通办法
element.onmousedown = new Function("return false");
element.onmouseup = new Function("return true");
}

div {
-moz-user-select:none;
-webkit-user-select:none;
user-select:none;
}

window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();