有關於網頁設計和程式....

<script>
/*這是在驗證第一碼是不是大寫的英文*/   
function firstlettererr(id){
var fl=id.value.substr(0,1);   
var T="ABCDEFGHJKLMNPQRSTUVWXYZ";  
var smp=id.value.substr(0,1)   
     if (T.indexOf(smp) == -1){
     return false; }else{
     return true;
     }    
} 
/*驗證是否有十位數*/  
function checkid(id){   
     if(id.value.length==10){
     return true; }else{
     return false;}   
}
/*驗證第一碼不為數字或是小寫或中文*/   
function chfastid(id) {   
var c = id.value.charAt(0);   
     if(c<"A" || c> "Z"){
     return false;}else{
     return true; }   
}
/*確保第二碼一定是1 0r 2(因為身分証第二碼一定是1 0r 2)*/
function ch12fastid(id) {   
var c = id.value.charAt(1);   
    if(c!="1" && c!="2"){
    return false;}else{
    return true; }   
}
/*驗證後九碼為數字*/     
function idmanber(id){
var bmp;   
var d="0123456789";   
var bab=id.value.length-1;   
     for (var i=1;i<=bab;i++){   
     bmp=id.value.substr(i,1)   
         if (d.indexOf(bmp) == -1) {
         return false;
         }    
     }   
    if(id.value != "0"){
    return true; }else{
    return false; 
    }    
}  
function idchackok(id) {
var alph = new Array("A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","S","T","U","V","X","Y","W","Z","I","O");   
var num = new Array("10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31","32","33","34","35");   
var n=0;   
for(i=0;i<alph.length;i++)   
if(id.value.charAt(0)==alph[i])   
n=i;   
var tot1 = parseFloat(num[n].charAt(0)) + (parseFloat(num[n].charAt(1)) * 9);   
var tot2 = 0;   
for(i=1;i<id.value.length-1;i++)   
tot2 = tot2 + parseFloat(id.value.charAt(i))*(9-i);   
var tot3 = parseFloat(id.value.charAt(9));   
var tot4 = tot1 + tot2 + tot3;   
if((tot4 % 10)!=0)   
{ return false; } else { return true; }   
}   
function idChech(id){
if(checkid(id) == false){   
alert("您的身份證字號位數不對!!");   
return false;   
}else if(chfastid(id) == false){   
alert("您的身分證字號第一碼必須是大寫的英文字母 !");   
return false;   
}else if(ch12fastid(id) == false){   
alert("您的身分證字號第二碼有問題 !");   
return false;   
}else if(firstlettererr(id) == false){   
alert("您的身份證字號錯誤!!");   
return false;   
}else if(idmanber(id) == false){   
alert("您的身份證字號後9碼應為數字!!");   
return false;   
}else if(idchackok(id) == false){   
alert("您的身分證字號有問題 !");   
return false;   
}else{document.getElementById('form2').submit();}
}    
function submitall(){
var id=document.getElementById('number'); 
firstlettererr(id);
checkid(id); 
chfastid(id);    
ch12fastid(id);  
idmanber(id);
idchackok(id); 
idChech(id);   
}
</script>
<div id="login">
    <div id="inlogin1" align="center">請先登入</div>
    <div id="inlogin2" align="center">(第一次登入者，直接填寫即可註冊。)</div>
    <div id="inlogin3" align="center">
        <form action="" method="get"  id="form2" name="form2">
        <div align="right">中文姓名:</div>
        <div><input type="text" name="name" style="width:100px" id="name"></div>
        <div align="right">身分證字號:</div>
        <div><input type="text" name="number" id="number" style="width:100px"></div>
        <div id="submitinlogin"><input type="button" value="送出" onclick="submitall()"></div>
        </form>
    </div>
</div>