//此为检查email格式的...
<script language="JavaScript1.2">
function check(theForm) {
var checkOK = "0123456789abcdefghijklmnopqrstuvwxyz_-@.";
var checkStr = theForm.email.value;
var allValid = true;
var decPoints = 0;
var allNum = "";
for (i = 0; i < checkStr.length; i++)
{
ch = checkStr.charAt(i);
for (j = 0; j < checkOK.length; j++)
if (ch == checkOK.charAt(j))
break;
if (j == checkOK.length)
{
allValid = false;
break;
}
if (ch != ".")
allNum += ch;
}
if (!allValid)
{
alert("您的信箱地址中有非法字符!");
theForm.email.focus();
return (false);
}
if (theForm.email.value !== "")
{
var checkOK2 = theForm.email.value;
var checkStr2 = "@.";
var allValid2 = true;
var decPoints2 = 0;
var allNum2 = "";
for (i = 0; i < checkStr2.length; i++)
{
ch2 = checkStr2.charAt(i);
for (j = 0; j < checkOK2.length; j++)
if (ch2 == checkOK2.charAt(j))
break;
if (j == checkOK2.length)
{
allValid2 = false;
break;
}
if (ch2 != ".")
allNum2 += ch2;
}
if (!allValid2)
{
alert("您的信箱地址中缺少有效字符!");
theForm.email.focus();
return (false);
}
}
}
</script>