复制代码 代码如下:

(function($){

$.fn.extend({

insertAtCaret: function(myValue){

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

if (document.selection) {

this.focus();

sel = document.selection.createRange();

sel.text = myValue;

this.focus();

}

else

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

var startPos = $t.selectionStart;

var endPos = $t.selectionEnd;

var scrollTop = $t.scrollTop;

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

this.focus();

$t.selectionStart = startPos + myValue.length;

$t.selectionEnd = startPos + myValue.length;

$t.scrollTop = scrollTop;

}

else {

this.value += myValue;

this.focus();

}

}

})

})(jQuery);

使用方法:

复制代码 代码如下: $(selector).insertAtCaret("value");