Jquery在光标位置插入内容

IE下可以通过document.selection.createRange();来实现，而Firefox（火狐）浏览器则 需要首先获取光标位置，然后对value进行字符串截取处理

(function($){

02	$.fn.extend({

03	insertAtCaret: function(myValue){

04	var $t=$(this)[0];

05	if (document.selection) {

06	this.focus();

07	sel = document.selection.createRange();

08	sel.text = myValue;

09	this.focus();

10

}

11

else

12	if ($t.selectionStart || $t.selectionStart == '0') {

13	var startPos = $t.selectionStart;

14	var endPos = $t.selectionEnd;

15	var scrollTop = $t.scrollTop;

16	$t.value = $t.value.substring(0, startPos) + myValue + $t.value.substring(endPos, $t.value.length);

17	this.focus();

18	$t.selectionStart = startPos + myValue.length;

19	$t.selectionEnd = startPos + myValue.length;

20	$t.scrollTop = scrollTop;

21

}

22

else {

23	this.value += myValue;

24	this.focus();

25

}

26

}

27

})

28	})(jQuery);

使用方法:

1	$(selector).insertAtCaret("value");

转自http://www.popo4j.com/article/Jquery-insert-content-at-the-cursor-position.html