用JavaScript获取页面上被选中的文字的技巧

event.selection = window.getSelection();

selection

.toString()

$(document).ready(function () {
$(".contenttext").mouseup(function (e) {
var txt;
var parentOffset = $(this).offset();
var x = e.pageX - parentOffset.left;
var y = e.pageY - parentOffset.top;
txt = window.getSelection();
if (txt.toString().length > 1) {
alert(txt);
}
});
});