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jquery实现在光标位置插入内容的方法教程

程序员文章站 2022-04-08 10:19:21
jquery实现在光标位置插入内容的方法教程，代码如下:    

jquery实现在光标位置插入内容的方法教程，代码如下:

<!DOCTYPE html> 
<html> 
<head> 
    <title>无标题页</title> 
    <script type="text/javascript" src="jquery-1.7.2.min。js"></script> 
    <script type="text/javascript"> 
        (function ($) { 
            $.fn.extend({ 
                insertAtCaret: function (myValue) { 
                    var $t = $(this)[0]; 
                    if (document.selection) { 
                        this.focus(); 
                        sel = document.selection.createRange(); 
                        sel.text = myValue; 
                        this.focus(); 
                    } else 
                        if ($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; 
                        } else { 
                            this.value += myValue; 
                            this.focus(); 
                        } 
                } 
            }) 
        })(jQuery); 
        $(document).ready(function () { 
            $("#numd").bind("mouseleave", function () { 
                document.getElementById('keybored').style.display = 'none'; 
                document.getElementById('Nm').blur(); 
            }); 
            $("#Nm").focus(function () { 
                document.getElementById('keybored').style.display = ''; 
            }); 
            $(".readbtns").click(function () { 
                $("#Nm").insertAtCaret($(this).val()); 
            }); 
        }); 
    </script> 
</head> 
<body> 
    <ul> 
        <li> 
            <input /> 
            <p> 
 &nnbsp;          </p> 
        </li> 
    </ul> 
    <input id="hid" type="text" value="" style="display: none" /> 
    <span id="numd" style="border: 1px solid red; clear: both; display: inline-block; font: 800em;"> 
        <input type="text" id="Nm" name="Nm" value="" /> 
        <p style="display: none; border: 1px solid #A2B4C6; width: 150px; height: 400px;" 
            id="keybored"> 
            <input type="button" class="readbtns" value="1" /> 
            <input type="button" class="readbtns" value="2" /> 
            <input type="button" class="readbtns" value="3" /> 
            <input type="button" class="readbtns" value="4" /> 
            <input type="button" class="readbtns" value="5" /> 
            <input type="button" class="readbtns" value="6" /> 
            <input type="button" class="readbtns" value="7" /> 
            <input type="button" class="readbtns" value="8" /> 
            <input type="button" class="readbtns" value="9" /> 
        </p> 
    </span> 
</body> 
</html>

 

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