verifica campo data

[biocco]

fattooooo!!!

function verifica(form) {
    if ((form.dal.value != "") || (form.a.value != "")){     
		if(!form.dal.value.match(/^(0[1-9]{1}|[1-2]\d{1}|3(0|1))\/(0[1-9]{1}|1[0-2]{1})\/(19|20)\d{2}$/)) {     
    	alert("Occorre inserire la data di ricerca in modo corretto (gg/mm/aaaa)");     
    	return false;
 		} else if(!form.a.value.match(/^(0[1-9]{1}|[1-2]\d{1}|3(0|1))\/(0[1-9]{1}|1[0-2]{1})\/(19|20)\d{2}$/)) {     
    	alert("Occorre inserire la data di ricerca in modo corretto (gg/mm/aaaa)");     
    	return false;
	 	}   
		return true;
	  }
}