我正在使用警報的JavaScript驗證。完整的代碼是:如何把錯誤在javascript驗證
<html>
<head>
<title>Form Validation</title>
<script type="text/javascript">
<!--
function validateEmail()
{
var emailID = document.myForm.EMail.value;
atpos = emailID.indexOf("@");
dotpos = emailID.lastIndexOf(".");
if (atpos < 1 || (dotpos - atpos < 2))
{
alert("Please enter correct email ID")
document.myForm.EMail.focus() ;
return false;
}
return(true);
}
function validate()
{
if(document.myForm.Name.value == "")
{
alert("Please provide your name!");
document.myForm.Name.focus() ;
return false;
}
if(document.myForm.EMail.value == "")
{
alert("Please provide your Email!");
document.myForm.EMail.focus() ;
return false;
}else{
// Put extra check for data format
var ret = validateEmail();
if(ret == false)
{
return false;
}
}
if(document.myForm.Zip.value == "" ||
isNaN(document.myForm.Zip.value) ||
document.myForm.Zip.value.length != 5)
{
alert("Please provide a zip in the format #####.");
document.myForm.Zip.focus() ;
return false;
}
if(document.myForm.Country.value == "-1")
{
alert("Please provide your country!");
return false;
}
return(true);
}
//-->
</script>
</head>
<body>
<form action="/cgi-bin/test.cgi" name="myForm" onsubmit="return(validate());">
<table cellspacing="2" cellpadding="2" border="1">
<tr>
<td align="right">Name</td>
<td><input type="text" name="Name" /></td>
</tr>
<tr>
<td align="right">EMail</td>
<td><input type="text" name="EMail" /></td>
</tr>
<tr>
<td align="right">Zip Code</td>
<td><input type="text" name="Zip" /></td>
</tr>
<tr>
<td align="right">Country</td>
<td>
<select name="Country">
<option value="-1" selected>[choose yours]</option>
<option value="1">USA</option>
<option value="2">UK</option>
<option value="3">INDIA</option>
</select>
</td>
</tr>
<tr>
<td align="right"></td>
<td><input type="submit" value="Submit" /></td>
</tr>
</table>
</form>
</body>
</html>
的問題是,我想錯誤的div,而不是alerts.how我該追加的div錯誤的類和成功,而不是警報?請幫助。
我不認爲你應該表現發生錯誤時的警報。你應該拋出一個'Exception();'並將其捕獲到頂層。 – Sebas