var name = "Name";

var email = "email";

var comment = "Comment";

var warning = "";

var flag=0;

function checkform_big5() {

if (document.mail.name.value == "")
  {
   warning=warning + "½Ð¿é¤J©m¦W";
   flag=1;
  }

if (document.mail.email.value == "")
  {
   if (flag==0) {
   warning=warning + "½Ð¿é¤J¹q¶l¦a§}";
   flag=2;
   }
   if (flag==1) {
   warning=warning + ", ¹q¶l¦a§}";
   flag=2;
   }
  }

if (document.mail.comment.value == "")
  {
   if(flag==1 || flag==2) {
   warning=warning + ", ¯d¨¥";
   flag=3;
   }

   if (flag==0) {
   warning=warning + "½Ð¿é¤J¯d¨¥";
   flag=3;
   }
  }

if (flag!=0) {
alert(warning);
flag=0;
warning="";
}
else {
document.mail.submit();
}
}

function checkform_gb() {

if (document.mail.name.value == "")
  {
   warning=warning + "ÇëÊäÈëÐÕÃû";
   flag=1;
  }

if (document.mail.email.value == "")
  {
   if (flag==0) {
   warning=warning + "ÇëÊäÈëµçÓʵØÖ·";
   flag=2;
   }
   if (flag==1) {
   warning=warning + ", µçÓʵØÖ·";
   flag=2;
   }
  }

if (document.mail.comment.value == "")
  {
   if(flag==1 || flag==2) {
   warning=warning + ", ÁôÑÔ";
   flag=3;
   }

   if (flag==0) {
   warning=warning + "ÇëÊäÈëÁôÑÔ";
   flag=3;
   }
  }

if (flag!=0) {
alert(warning);
flag=0;
warning="";
}
else {
document.mail.submit();
}

}

function checkform() {

if (document.mail.name.value == "")
  {
   warning=warning + "Please input Your Name";
   flag=1;
  }

if (document.mail.email.value == "")
  {
   if (flag==0) {
   warning=warning + "Please input Your E-mail";
   flag=2;
   }
   if (flag==1) {
   warning=warning + ", Your Email";
   flag=2;
   }
  }

if (document.mail.comment.value == "")
  {
   if(flag==1 || flag==2) {
   warning=warning + ", Comment";
   flag=3;
   }

   if (flag==0) {
   warning=warning + "Please input Your Comment";
   flag=3;
   }
  }

if (flag!=0) {
alert(warning);
flag=0;
warning="";
}
else {
document.mail.submit();
}

}