编辑代码

function f_creadit() 
{
    var bank_no = document.getElementById("bank_no_select").value; 
    var prefix = "";
    switch (bank_no) 
    {
        case "0102":        prefix = "622202";        break;
        case "0103":        prefix = "622848";        break;
        case "0105":        prefix = "622700";        break;
        case "0301":        prefix = "622262";        break; 
        case "104":        prefix = "621661";        break; 
        case "0303":        prefix = "622666";        break;
        case "305":        prefix = "622622";        break;
        case "0306":        prefix = "622556";        break;
        case "0308":        prefix = "622588";        break;
        case "0410":        prefix = "622155";        break;
        case "302":        prefix = "622689";        break;
        case "304":        prefix = "622630";        break;
        case "309":        prefix = "622908";        break;
        case "310":        prefix = "621717";        break;
        case "315":        prefix = "622323";        break;
        case "316":        prefix = "622309";        break; 
        default:
    }
    for (var j = 0; j < 13; j++)
    {
        prefix = prefix + Math.floor(Math.random() * 10);
    }

    var x = document.getElementsByName("bank_no");
    for (var i = 0; i < x.length; i++) 
    {
        var o = x[i];
        o.value = bank_no;
    }
    
    var y = document.getElementsByName("bank_account");
    for (var i = 0; i < y.length; i++) 
    {
        var o = y[i];
        o.value = prefix;
    }
}