function check()
{
if (document.forms[1].UserName.value.length<=0)
{
alert("请输入你的姓名");document.forms[1].UserName.focus();return false;
}
else if (document.forms[1].EMail.value.length<=0)
{
alert("请输入你的e-mail ");document.forms[1].EMail.focus();return false;
}
else if (document.forms[1].EMail.value.indexOf("@") == -1 &
document.forms[1].EMail.value.indexOf(".") == -1)
{ alert("请输入正确的e-mail");document.forms[1].EMail.focus();return false;
}
else if (document.forms[1].Requirement.value.length<=0)
{
alert("请输入你的想法和建议");document.forms[1].Requirement.focus();return false;
}


document.forms[1].Reference.value = document.referrer;
return true;
}