function anneOkul(source, args) {
    if (document.forms["Form1"].elements["txtOkul"].value == "" && document.forms["Form1"].elements["txtAnneSoyad"].value == "" )
        args.IsValid = false;
    else
        args.IsValid = true;
}

function checkCC(source, args) { 
var i,noOfEmpty;
var ccValues = new Array();

ccValues[0] = document.getElementById('txtKK1').value ;
ccValues[1] = document.getElementById('txtKK2').value ;
ccValues[2] = document.getElementById('txtKK3').value ;
ccValues[3] = document.getElementById('txtKK4').value ;
ccValues[4] = document.getElementById('txtCVC').value ;

noOfEmpty = 0;

for(i=0;i<5;i++) {
    if(ccValues[i]!="")
        noOfEmpty++  
}

if(noOfEmpty!=0 && noOfEmpty!=5)
    args.IsValid = false;
else
    args.IsValid = true;

}
function focusNext(index) {

var controls = new Array();

controls[0] = document.getElementById('txtKK1');
controls[1] = document.getElementById('txtKK2');
controls[2] = document.getElementById('txtKK3');
controls[3] = document.getElementById('txtKK4');

//alert(index)

if(controls[index].value.length == 4)
    controls[index+1].focus();

}