/**
*	Retorna o valor do radiobutom
*/
function getRadioValue(form, radioName) {
	for(var i=0; i<form.elements.length; i++){
		var element=form.elements[i];
		if(element.name==radioName){
			if(element.checked){
				return element.value;
			}
		}
	}
}

function votar(form){
	// Obtem a URL da enquete passando o voto	
	var eq = getRadioValue(form, 'eq');
	
	if(eq==undefined){
		alert('Selecione um item');
		return false;
	}
	
	var url = '/ssi_enquete.php?result' + '&id='+form.eqid.value + '&voto='+eq;	

	var content4Loading = '<p><img id="loading" src="/imagens/loading.gif" alt="Carregando"/></p>';

	var obj_container = document.getElementById('enquete');
	var altura_pri = parseInt(obj_container.offsetHeight);
	obj_container.style.minHeight = altura_pri + 'px';

	document.getElementById('enquete').innerHTML = content4Loading;
	var loading = document.getElementById('loading');
	loading.style.paddingTop = Math.round((altura_pri / 2) - 50) + 'px';

	try {
		new Ajax.Request(url, {

			onSuccess: function(transport) {
				document.getElementById('enquete').innerHTML = transport.responseText;		
			},

			onFailure: function(error){
				document.getElementById('enquete').innerHTML = '<h2>' + error.statusText + 
				'<br/>Código do erro: ' + error.status + '</h2>';
			}
		});
	}catch(e){
		document.getElementById('enquete').innerHTML = "<h2>Erro " + e + "</h2>"
	}
	return false;
}