`

js表单验证

阅读更多
<html>
<head>
<script type="text/javascript">

function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {alert(alerttxt);return false}
  else {return true}
  }
}

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(name,"name-qtxwz")==false)
    {name.focus();return false}
    if (validate_required(pwd,"pwd-qtxwz")==false)
      {pwd.focus();return false}
	  if (validate_required(tel,"tel-qtxwz")==false)
	    {tel.focus();return false}
	    if (validate_required(address,"address-qtxwz")==false)
	      {address.focus();return false}
		  if (validate_required(email,"email-qtxwz")==false)
		    {email.focus();return false}
  }
}
</script>
</head>

<body>
<form action="submitpage.htm" onsubmit="return validate_form(this)" method="post">
Name: <input type="text" name="name" size="30">
PWD: <input type="text" name="pwd" size="30">
tel: <input type="text" name="tel" size="30">
address: <input type="text" name="address" size="30">
Email: <input type="text" name="email" size="30">
<input type="submit" value="Submit"> 
</form>
</body>

</html>

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