function overAba(id) {
	var url = url_base;

	document.getElementById('aba1').src=url+"imgs/viasite_aba_inst_quemsomos_d.gif";
	document.getElementById('aba2').src=url+"imgs/viasite_aba_inst_infra_d.gif";
	document.getElementById('aba3').src=url+"imgs/viasite_aba_inst_negocios_d.gif";
	document.getElementById('aba4').src=url+"imgs/viasite_aba_inst_difer_d.gif";
	document.getElementById('aba5').src=url+"imgs/viasite_aba_inst_politicas_d.gif";
	if (id == 1) {
		document.getElementById('aba1').src=url+"imgs/viasite_aba_inst_quemsomos.gif";
	}
	if (id == 2) {
		document.getElementById('aba2').src=url+"imgs/viasite_aba_inst_infra.gif";
	}
	if (id == 3) {
		document.getElementById('aba3').src=url+"imgs/viasite_aba_inst_negocios.gif";
	}
	if (id == 4) {
		document.getElementById('aba4').src=url+"imgs/viasite_aba_inst_difer.gif";
	}
	if (id == 5) {
		document.getElementById('aba5').src=url+"imgs/viasite_aba_inst_politicas.gif";
	}
}