function myFunction() {
var x = document.getElementById("fname");
//for only digits
//x.value = x.value.replace(/[1-9()]/g,'match');
//for only digits and ()
//x.value = x.value.replace(/[^0-9^(^)]/g,'');
//for only digits and () and whitespace
x.value = x.value.replace(/[^0-9^(^)^\s]/g,'');
//x.value = x.value.replace(/\D/g,'');
// x.value = x.value.replace(/\D\^(\^)\-/g,'');
}
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