Javacript验证问题 [英] Javacript Validation Problem

问题描述

Hello Guys



你能帮助我们如何进行javascript验证吗？我想在用户同时输入数字和非数字值时提醒消息文本字段。例如min234。



如果将上述示例插入到文本字段中，则应显示弹出消息，例如请仅输入非数字值。我已经尝试过该代码，但它不起作用：

Hello Guys

Can you please help how to make javascript validation?I want to alert a message when a user input both a numeric and a non numeric value in a textfield. e.g. min234.

If the above example was inserted into a textfield a pop up message should be displayed such as "Please enter a non-numeric value only". I've already try that code but it does not work:

function validateFN() 

{ 
var x=document.forms["form1"]["firstname"].value;

if ( isNaN (x) ) 

{ 
alert("Numbers cannot be inserted!"); 

return false; 
} 
} 

谢谢你帮助

Thanks guy please help

推荐答案

你可以添加一个如果你的代码声明更多，如下所示：



x = document.myForm.myInput.value;

You could add one more else if statement to your code like below:

x=document.myForm.myInput.value;

else if(isNaN(x))

    {
        alert("Number cant be alphabet")
        return false
    }

以下是完整的脚本

Below is the Full Script

<script>
            function validate(){
    x=document.myForm.myInput.value;

    if (x >=10)

    {
        alert("Number is bigger than 10")
        return true

    }

    else if(isNaN(x))

    {
        alert("Number cant be alphabet")
        return false
    }
    else

    {
        alert("Number is smaller than 10")
        return false
    }

}
    </script>

如果您需要，可以访问这个 [ ^ ]和这个 [ ^ ] links。

Further in details if you required you can visit This[^] and This[^] links.

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