<TEXTAREA ROWS="20" COLS="100" id='test'>123456798<B>123</B></TEXTAREA> <INPUT TYPE="button" value='insert("abc")' OnClick='_insertText("abc")'> <SCRIPT LANGUAGE="JavaScript"> <!--     var _insertText = function(A){         var B = document.getElementById('test');         B.focus();         var C = document.selection.createRange();         if(C){             if(C.text.length > 0) C.text += A;             else C.text= A;                                                C.select();         }     } //--> </SCRIPT>