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jquery获取光标位置插入字符.

jquery获取光标位置插入字符,js光标位置 (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....