<body>
<form name=form1>
<input type=text name=email size=25>
<input type=button value=检验EMAIL地址是否合法 onclick="email123()">
<input type=reset value=重置 name=reset>
</form>
<script language=javascript>
<!--
function email123(){
var a=document.form1.email.value;
if ((a=="") ||(a.indexOf('@')==-1) ||(a.indexOf('.')==-1)) {
alert("你输入的E-MAIL地址不正确,请重新输入,谢谢!");
}
else
alert("地址输入正确");
}//-->
</script>
<form name=form1>
<input type=text name=email size=25>
<input type=button value=检验EMAIL地址是否合法 onclick="email123()">
<input type=reset value=重置 name=reset>
</form>
<script language=javascript>
<!--
function email123(){
var a=document.form1.email.value;
if ((a=="") ||(a.indexOf('@')==-1) ||(a.indexOf('.')==-1)) {
alert("你输入的E-MAIL地址不正确,请重新输入,谢谢!");
}
else
alert("地址输入正确");
}//-->
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>new document </title>
<meta name="generator" content="editplus" />
<meta name="author" content="Gao YiXiang" />
<meta name="email" content="[email protected]" />
<meta name="keywords" content="javascript dhtml dom" />
<meta name="description" content="I love web development." />
</head>
<body>
<form name="form1">
<input type="text" name="email" size="25">
<input type="button" value="检验EMAIL地址是否合法" onclick="checkEmail();">
<input type="reset" value="重置" name="reset">
</form>
<script type="text/javascript">
<!--
function checkEmail()
{
var a = document.form1.email.value; if ((a=="") ¦¦ (a.indexOf('@')==-1) ¦¦ (a.indexOf('.')==-1))
{
alert("你输入的E-MAIL地址不正确,请重新输入,谢谢!");
}
else
alert("地址输入正确");
}
//-->
</script>
</body>
</html>
呵呵,原来这里错了,建议加个前缀,例如:tbxEmail、txtEmail等。