Question

我有一个HTML表单，我想在其中验证使用JavaScript提交的买方输入。

我想如果用户未输入字母，空格或数字，则将显示警报。基本上，我只接受字母，空格和数字。

为此，我将这个JS函数与买方字段的验证规则一起使用。但似乎是错误的:(

function validateForm () {

    var amount      =   document.forms["salesform"]["amount"];               
    var buyer       =   document.forms["salesform"]["buyer"];    
    var receipt_id  =   document.forms["salesform"]["receipt_id"];  
    var buyer_email =   document.forms["salesform"]["buyer_email"];  
    var note        =   document.forms["salesform"]["note"];  
    var city        =   document.forms["salesform"]["city"];  
    var phone       =   document.forms["salesform"]["phone"];
    var entry_by    =   document.forms["salesform"]["entry_by"];      
    var buyerRegex  =   "/^[a-z][a-z\s]*$/" 


    if (amount.value == "") { 
        alert("Please enter the amount."); 
        amount.focus(); 
        return false; 
    } else if (isNaN(amount.value)) {
        alert("Amount should be only numeric value."); 
        amount.focus(); 
        return false; 
    }

    if (buyer.value == "") { 
        alert("Buyer name is required"); 
        buyer.focus(); 
        return false; 
    } else if (!buyer.value.match(buyerRegex)) {
        alert("Buyer name only contain letter, number and space."); 
        buyer.focus(); 
        return false; 
    }

    return true;
}

Answer 1

您不应该使用0-9代替a-z吗？

var buyerRegex  =   "/^[a-z0-9\s]*$/"

Answer 2

已插入匹配项，尝试对regix使用测试

buyerRegex = "/^[a-z0-9\s]*$/"

if (!buyer.value.test(buyerRegex)) {
        alert("Buyer name only contain letter, number and space."); 
        buyer.focus(); 
        return false; 
    }

JavaScript仅允许字母和数字

2 个答案: