function check_login_form(){
var form1=document.login;
var pass_strlen=form1.pass.value.length;

if(form1.username.value==""){
alert('請輸入帳號');
return false;

}else if(form1.pass.value==""){
alert('請輸入密碼');
return false;

}else{
return true;
}

}

function check_forget_form(){
var form1=document.forget;
var pass_strlen=form1.pass.value.length;

if(form1.username.value==""){
alert('請輸入帳號');
return false;

}else if(form1.email.value==""){
alert('請輸入密碼');
return false;

}
}