textarea在光标位置添加内容-蒲公英云

textarea在光标位置添加内容

(function($)
{
$.fn.extend(
{
insertContent : function(myValue, t)
{
var $t = $(this)[0];
if (document.selection) { // ie
this.focus();
var sel = document.selection.createRange();
sel.text = myValue;
this.focus();
sel.moveStart(‘character’, -l);
var wee = sel.text.length;
if (arguments.length == 2) {
var l = $t.value.length;
sel.moveEnd(“character”, wee + t);
t <= 0 ? sel.moveStart(“character”, wee - 2 * t

                     - myValue.length) : sel.moveStart(    
                     "character", wee - t - myValue.length);    
             sel.select();    
         \}    
     \} 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;    
         if (arguments.length == 2) \{    
             $t.setSelectionRange(startPos - t,    
                     $t.selectionEnd + t);    
             this.focus();    
         \}    
     \} else \{    
         this.value += myValue;    
         this.focus();    
     \}    
 \}