function voltar()
{
	history.back();
	return true;
}

function isNum( caractere ) 
{ 
         var strValidos = "0123456789" 
         if ( strValidos.indexOf( caractere ) == -1 ) 
                 return false; 
         return true; 
} 
function validaTecla(campo, event) 
{ 
         var BACKSPACE=  8; 
         var key; 
         var tecla; 


         CheckTAB=true; 
         if(navigator.appName.indexOf("Netscape")!= -1) 
                 tecla= event.which; 
         else 
                 tecla= event.keyCode; 


         key = String.fromCharCode( tecla); 
         //alert( 'key: ' + tecla + '  -> campo: ' + campo.value); 


         if ( tecla == 13 ) 
                 return false; 
         if ( tecla == BACKSPACE ) 
                 return true; 
         return ( isNum(key)); 
}


function submitenter(Senha,e,func)
{
	var keycode;
		if (window.event) keycode = window.event.keyCode;
			else if (e) keycode = e.which;
		else return true;

		if (keycode == 13)
		   {
			   eval(func+"()");
			   return false;
		   }
		else
			   return true;
}


function popup(url, frame, param)
{
	window.open(url, frame, param);
}

function MaskCep(str)
{
	
	if( str.value.length == 5 )
	{
		str.value += "-";
	}
	
	return true;
}