function para(){
if(navigator.appName == 'Microsoft Internet Explorer') {
			if(event.keyCode=="13"){
			event.keyCode=0;
			return false;
		}
	}
else {
	if(navigator.appName == 'Netscape') {
			if(event.wich=="13"){
			event.wich=0;
			return false;
		}
	}
	}
}
function Formata_Telefone(objeto,tammax,teclapres)
{
	var tecla = teclapres.keyCode;
	vr = objeto.value;
	vr = vr.replace( "(", "" );
	vr = vr.replace( ")", "" );
	vr = vr.replace( " ", "" );
	vr = vr.replace( "-", "" );
	tam = vr.length;
	if (tam < tammax && tecla != 8) {
		tam = vr.length + 1 ;
	}
	if (tecla == 8 ) {
		tam = tam - 1 ;
	}
	if ( tecla == 8 || tecla >= 48 && tecla <= 57 || tecla >= 96 && tecla <= 105 ) {
		if ( tam <= 4 ) { 
			objeto.value = vr ;
		}
		if ( (tam > 4) && (tam <= 8) ) {
			objeto.value = vr.substr(0,tam-4) + '-' + vr.substr( tam - 4, tam ) ;
		}
		if ( (tam >= 9) && (tam <= 10) ) {
			objeto.value = '(' + vr.substr(0,2) + ') ' + vr.substr(2,tam-6) + '-' + vr.substr(tam-4,tam) ;			
		}
	}		
}