js 获取文本框中光标所在字符串索引位置

最新推荐文章于 2024-09-27 14:38:27 发布

原创最新推荐文章于 2024-09-27 14:38:27 发布 · 9.1k 阅读

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <title> New Document </title>
  <meta name="Generator" content="EditPlus">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
 </head>

 <body>
  <script>
function getTxt1CursorPosition(){
            var $input = document.getElementById("input1");
            var cursurPosition=0;
            if($input.selectionStart){//非IE
                cursurPosition= $input.selectionStart;
            }else{//IE
                try{
                var range = document.selection.createRange();
                range.moveStart("character",-$input.value.length);
                cursurPosition=range.text.length;
                }catch(e){
                 cursurPosition = 0;
                }
            }
            alert(cursurPosition);//打印当前索引
        }
</script>
<input type="text" id="input1" value="10000" onclick="getTxt1CursorPosition()">
 </body>
</html>