JS限制输入框输入的实现代码

1.文本框只能输入数字代码(小数点也不能输入)

代码如下:

2.只能输入数字,能输小数点.

代码如下:

3.数字和小数点方法二

代码如下:

4.只能输入字母和汉字

代码如下:

5.只能输入英文字母和数字,不能输入中文

代码如下:

6.只能输入数字和英文chun

代码如下:

7.小数点后只能有最多两位(数字,中文都可输入),不能输入字母和运算符号:

代码如下:

8.小数点后只能有最多两位(数字,字母,中文都可输入),可以输入运算符号:

代码如下:

//只能输入汉字： 

//只能输入数字： 

//只能输入英文和数字： 

//控制输入框只能输入文字或数字，也可以不允许输入特殊字符 
//这里不允许输入如下字符: (像 !@#$%^&* 等)
 
//只禁止空格输入 
onkeyup="value=value.replace(/s/g,'')" 
//只能输入中文和英文： 
onkeyup="value=value.replace(/[^a-zA-Zu4E00-u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^a-zA-Zu4E00-u9FA5]/g,''))"  </pre>

<p><strong>总结</strong></p>
<p>以上所述是小编给大家介绍的JS限制输入框输入的实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！</p></div>
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