HI,
I test it with code below:
$(function () {
var isCtrl = false;
var bol = false;
$(document).keyup(function (e) {
if (e.keyCode == 17)
isCtrl = false;
if (bol) //ctrl 和 A 任何一个keyup触发
{
document.execCommand('bold', false, null);
alert(selectElement().toString());
document.focus();
bol = false; //设置为false
}
}).keydown(function (e) {
if (e.keyCode == 17)
isCtrl = true;
if (e.keyCode == 65 && isCtrl == true) {
bol = true; //设置为true，表明ctrl+a组合键已经被按下
}
});
});
function getSelection() {
return (!!document.getSelection) ? document.getSelection() :
(!!window.getSelection) ? window.getSelection() :
document.selection.createRange().text;
}
当ctrl+A键释放的时候，alert弹出selection的内容是整个页面的source code，包括page title and js and content. 所以我认为问题出在这里。你可以尝试用creatrange 方法限制ctrl+A所选内容，之后应该可以正常工作了。这里有个类似的讨论你可以参考一下：
http://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse
希望对你有所帮助。
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