function trim(theString){
	while(theString.substr(0,1)==" ")
		theString=theString.substr(1);

	while(theString.substr(theString.length-1,1)==" ")
		theString=theString.substr(0,theString.length-1);

	return theString;
}

function chkLogin(theForm){

	var msg="";
	var j=0;
	var acnt=theForm.Account.value=trim(theForm.Account.value);
	acnt=theForm.Account.value=acnt==theForm.Account.defaultValue?"":acnt;
	var pwd=theForm.Pwd.value=trim(theForm.Pwd.value);

	msg+=acnt==""?(++j)+". 請輸入身分證字號\n":"";
	msg+=pwd==""?(++j)+". 請輸入密碼\n":"";
	
	if(msg!=""){
		alert("請檢查以下項目\n\n"+msg);
		return false;
	}
}