function searchTarifa()
	{
		var tarifa_US = getCrossElementById('tarifa_US');
		var seekDestino = getCrossElementById('seekDestino');
		if(seekDestino.value!='')
		{
			tarifa_US.innerHTML='u$s ' + Math.round(seekDestino.value*1000)/1000;
		}
	}
	function getCrossElementById(id) {
			var elm = null;
			if (document.getElementById) {
				// browser implements part of W3C DOM HTML
				// Gecko, Internet Explorer 5+, Opera 5+
				elm = document.getElementById(id);
			} else if (document.all) {
				// Internet Explorer 4 or Opera with IE user agent
				elm = document.all[id];
			} else if (document.layers) {
				// Navigator 4
				elm = document.layers[id];
			}
	
			return elm;
	}