设置/获取光标在文本框的位置

getCurPos: function(){var e=$(this).get(0);e.focus();if(e.selectionStart){//FFreturn e.selectionStart;}if(document.selection){//IEvar r = document.selection.createRange();if (r == null) {return e.value.length;}var re = e.createTextRange();var rc = re.duplicate();re.moveToBookmark(r.getBookmark());rc.setEndPoint('EndToStart', re);return rc.text.length;}return e.value.length;},setCurPos: function(pos) {var e=$(this).get(0);e.focus();if (e.setSelectionRange) {e.setSelectionRange(pos, pos);} else if (e.createTextRange) {var range = e.createTextRange();range.collapse(true);range.moveEnd('character', pos);range.moveStart('character', pos);range.select();}},