Javascript selection的相容性寫法

 本文為大家講解下Javascript selection的相容性寫法，感興趣的朋友可以參考下

 代碼如下:function getSelectedText() { //this function code is borrowed from: http://www.codetoad.com/javascript_get_selected_text.asp  var txt = ""; if (window.getSelection) { txt = window.getSelection(); } else if (window.document.getSelection) { txt = window.document.getSelection(); } else if (window.document.selection) { txt = window.document.selection.createRange().text; } return txt; }