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var box1 = document.getElementById("checkbox1");
var box2 = document.getElementById("checkbox2");
var box3 = document.getElementById("checkbox3");
var box4 = document.getElementById("checkbox4");
var box5 = document.getElementById("checkbox5");
var box6 = document.getElementById("checkbox6");
var box7 = document.getElementById("checkbox7");
var box8 = document.getElementById("checkbox8");
if (box1.checked){
return true;
} else if (box2.checked){
return true;
} else if (box3.checked){
return true;
}else if (box4.checked){
return true;
}else if (box5.checked){
return true;
}else if (box6.checked){
return true;
}else if (box7.checked){
return true;
}else if (box8.checked){
return true;
} else {
alert ("Merci de cocher au moins une case.");
return false;
} |