IE:
KE = document.selection;
KE_RANGE = KE.createRange();
KE_RANGE_TEXT = KE_RANGE.text;
var startC = KE_RANGE.parentElement().parentNode;
FF:
KE =window.getSelection();
KE_RANGE = KE.getRangeAt(0);
KE_RANGE_TEXT = KE_RANGE.toString();
var startC = KE_RANGE.startContainer.parentNode;
转载于:https://www.cnblogs.com/lfzwenzhu/archive/2010/08/17/1801387.html