function prova(){
alert (document.searchdb.idnorm.value);
}

function disable1(){

	var x=document.getElementById("select1")
	var y=document.getElementById("select2")
	var z=document.getElementById("select3")

    x.disabled=false
	y.disabled=true
	z.disabled=true
	
	
	document.searchdb.selcd.checked=true
	document.searchdb.seloild.checked=false
	document.searchdb.selsl.checked=false

}
function disable2(){

	var x=document.getElementById("select1")
	var y=document.getElementById("select2")
	var z=document.getElementById("select3")
	
    x.disabled=true
	y.disabled=false
	z.disabled=true
	
	document.searchdb.selcd.checked=false
	document.searchdb.seloild.checked=true
	document.searchdb.selsl.checked=false
	
}
function disable3(){

	var x=document.getElementById("select1")
	var y=document.getElementById("select2")
	var z=document.getElementById("select3")
	
    x.disabled=true
	y.disabled=true
	z.disabled=false
	
	document.searchdb.selcd.checked=false
	document.searchdb.seloild.checked=false
	document.searchdb.selsl.checked=true
}