function convertNumber() {  
    const number = document.getElementById('number').value.trim();  
    const fromBase = parseInt(document.getElementById('fromBase').value, 10);  
    const toBase = parseInt(document.getElementById('toBase').value, 10);  

    let decimalValue;  
    switch (fromBase) {  
        case 2:  
            decimalValue = parseInt(number, 2);  
            break;  
        case 8:  
            decimalValue = parseInt(number, 8);  
            break;  
        case 10:  
            decimalValue = parseInt(number, 10);  
            break;  
        case 16:  
            decimalValue = parseInt(number, 16);  
            break;  
        default:  
            decimalValue = NaN;  
    }  

    if (isNaN(decimalValue)) {  
        document.getElementById('result').innerText = '无效的输入或进制值！';  
        return;  
    }  

    let resultValue;  
    switch (toBase) {  
        case 2:  
            resultValue = decimalValue.toString(2);  
            break;  
        case 8:  
            resultValue = decimalValue.toString(8);  
            break;  
        case 10:  
            resultValue = decimalValue.toString(10);  
            break;  
        case 16:  
            resultValue = decimalValue.toString(16).toUpperCase(); // 转换为大写十六进制  
            break;  
        default:  
            resultValue = '无效的转换进制！';  
    }  

    document.getElementById('result').innerText = `转换结果: ${resultValue}`;  
}