js获取光标位置和设置文本框光标位置示例代码

代码如下:[removed]        function getTxt1CursorPosition(){            var oTxt1 = document.getElementById(“txt1”);            var cursurPosition=-1;            if(oTxt1.selectionStart){//非IE浏览器                cursurPosition= oTxt1.selectionStart;            }else{//IE