打开浏览器调试模式，console 输入

document.getElementById('loginfrm').setAttribute('method','get')
document.getElementById('username').value = 'CUAdmin'
document.getElementById('password').value = 'CUAdmin'

function submitFrm(){
    with(document.forms[0]){
        if ( password.value.length == 0 ) {
            return;
        }
        if ( password.value.length > 32 ) {
            return;
        }
    }
    document.getElementById('loginfrm').submit();
}
submitFrm()