<script Language=\"JavaScript\">
function FormCheck(theform)
{
if (theform.hybz.value ==\"\")
{
alert(\"请选择注册类别！\");
theform.hybz.focus();
return (false);
}
if (theform.user.value ==\"\")
{
alert(\"请填写您的用户名！\");
theform.user.focus();
return false;
}
var filter=/^\\s*[.A-Za-z0-9_-]{5,15}\\s*$/;
if (!filter.test(theform.user.value)) {
alert(\"用户名填写不正确,请重新填写！可使用的字符为（A-Z a-z 0-9 _ - .)长度不小于5个字符，不超过15个字符，注意不要使用空格。\");
theform.user.focus();
theform.user.select();
return false;
}
if (theform.pass.value ==\"\")
{
alert(\"请填写您的密码！\");
theform.pass.focus();
return false;
}
if(theform.confirmPassword.value==\"\"){
alert(\"请输入您的确认密码！\");
theform.confirmPassword.focus();
return false;
}
var filter=/^\\s*[.A-Za-z0-9_-]{5,15}\\s*$/;
if (!filter.test(theform.pass.value)) {
alert(\"密码填写不正确,请重新填写！可使用的字符为（A-Z a-z 0-9 _ - .)长度不小于5个字符，不超过15个字符，注意不要使用空格。\");
theform.pass.focus();
theform.pass.select();
return false;
}
if (theform.pass.value!=theform.confirmPassword.value ){
alert(\"两次填写的密码不一致，请重新填写！\");
theform.pass.focus();
theform.pass.select();
return false;
}
if (theform.question.value ==\"\")
{
alert(\"请输入密码提示问题！\");
theform.question.focus();
return (false);
}
if (theform.answer.value ==\"\")
{
alert(\"请输入密码提示答案！\");
theform.answer.focus();
return (false);
}
if (theform.name.value ==\"\")
{
alert(\"请输入您的姓名！\");
theform.name.focus();
return (false);
}
if (theform.sf.value ==\"\")
{
alert(\"请选择区域！\");
theform.sf.focus();
return (false);
}
if (theform.city.value ==\"\")
{
alert(\"请选择城镇名！\");
theform.city.focus();
return (false);
}
if (theform.qymc.value ==\"\")
{
alert(\"请输入您的公司名称！\");
theform.qymc.focus();
return (false);
}
if (theform.qylb.value ==\"0\")
{
alert(\"请选择您的单位性质！\");
theform.qylb.focus();
return (false);
}
if (theform.address.value ==\"\")
{
alert(\"请输入您的联系地址！\");
theform.address.focus();
return (false);
}
if (theform.post.value ==\"\")
{
alert(\"请输入邮政编码！\");
theform.post.focus();
return (false);
}
if (theform.phone.value ==\"\")
{
alert(\"请输入您的联系电话！\");
theform.phone.focus();
return (false);
}
if (theform.email.value ==\"\")
{
alert(\"请输入您的电子邮件地址！\");
theform.email.focus();
theform.email.select();
return false;
}
var filter=/@/;
if (!filter.test(theform.email.value)) {
alert(\"邮件地址不正确,请重新填写！\");
theform.email.focus();
theform.email.select();
return false;
}
<!-- theform.submit() -->
}
</script>

调用代码：
表单提交时用下列代码调用