function cambiaClasse(nomeclass) {
        var elem = document.getElementById("logdiv");
        elem.className = nomeclass;
    }
	
function riscriviLogin(myfield, myname){
    if (myfield.value == myname || myfield.value < 2 || myfield.value == ''){
        myfield.value=myname;
    }
}

function riscriviContOnBlur(myfield, myname){
	if(myfield.value == "" || myfield.value == "undefined"){
		myfield.value = myname;		
	}
}


function riscriviContOnClick(myfield, myname){
	if(myfield.value == myname){
		myfield.value = "";
	}
}