function ValidateRev(validator1, validator2, imageName) {
    //alert(validator1 + " " + validator2 + " " + imageName)
    var Image1 = document.all ? document.all[imageName] : document.getElementById(imageName);

    if (typeof (Page_Validators) == "undefined") return;
    //alert(validator1.isvalid + ' ' + validator2.isvalid);
    if (validator1.isvalid && validator2.isvalid) {
        Image1.src = 'images/ok.gif'
        Image1.title = "Invoer correct"
    } else if (!validator1.isvalid) {
        Image1.src = 'images/verplicht.gif'
        Image1.title = "Invoer verplicht"
    } else {
        Image1.src = 'images/fout.gif'
        Image1.title = "Invoer incorrect"
    }
}

function ValidateRfv(validator1, imageName) {
    var Image1 = document.all ? document.all[imageName] : document.getElementById(imageName);
    //alert(validator1.isvalid + ' ' + imageName);
    if (typeof (Page_Validators) == "undefined") return;

    if (validator1.isvalid) {
        Image1.src = 'images/ok.gif'
        Image1.title = "Invoer correct"
    } else {
        Image1.src = 'images/verplicht.gif'
        Image1.title = "Invoer verplicht"
    }
}

function ValidateRqv(validator1, imageName) {

    var Image1 = document.all ? document.all[imageName] : document.getElementById(imageName);
    if (typeof (Page_Validators) == "undefined") return;
    if (validator1.isvalid) {
        Image1.style.visibility = "hidden"
    } else {
        Image1.src = 'images/fout.gif'
        Image1.title = "Invoer incorrect"
        Image1.style.visibility = "visible"
    }
}

function txtnummer_onkeydown() {
    var key;
    var retval;
    //alert(window.event.srcElement.value.length);
    retval = false;
    key = event.keyCode;
    switch (key) {
        //case 8: retval = true; break; // backspace
        //case 9: retval = true; break; // tab

        //case 49: retval = true; break;
        //case 50: retval = true; break;
        //case 51: retval = true; break;
        //case 52: retval = true; break;
        //case 53: retval = true; break;


        //case 97: retval = true; break;
        // case 98: retval = true; break;
        //case 99: retval = true; break;
        //case 100: retval = true; break;
        //case 101: retval = true; break; 
    }

    event.returnValue = retval;
}