function valEntNumero()
{
	return !isNaN(String.fromCharCode(event.keyCode)) || valNavegacao(event.keyCode);
}

function valPasteNumero()
{
	return !isNaN(window.clipboardData.getData("Text"));
}

function valNavegacao(keyCode)
{
	switch(keyCode)
	{
		case 46 :
		case 8:
		case 37:
		case 38:
		case 39:
		case 40:
			return true;
	}
	return false;
}

function exibirCalendario(objeto)
{
	var oObjAtual = document.getElementById(objeto + "_tab");
	oObjAtual.style.display = "block";
}

function sumirCalendario(objeto)
{
	var oObjDiv = window.document.getElementById(objeto + "_tab");
	oObjDiv.style.display = "none";
}

function sumirData(objeto)
{
	var oObj = window.document.getElementById(objeto);
	oObj.value = "";
	sumirCalendario(objeto);
}

function iniciar(objeto)
{
	exibirCalendario(objeto);
	
	var oData;
	var sData;
	
	if(window.document.getElementById(objeto + "_hid").value == "")
	{
		oData = new Date();
		sData = oData.getDate() + "/" + (oData.getMonth() + 1) + "/" + oData.getFullYear();
	}
	else {
		sData = window.document.getElementById(objeto + "_hid").value;
	}

	var aData = sData.split("/");
	oData = new Date();
	oData.setFullYear(aData[2]);
	oData.setMonth(aData[1] - 1);
	oData.setDate(aData[0]);

	window.document.getElementById(objeto + "_ddlMes").value = oData.getMonth();
	window.document.getElementById(objeto + "_txtAno").value = oData.getFullYear();

	window.document.getElementById(objeto + "_hid").value = oData.getDate() + "/" + (oData.getMonth() + 1) + "/" + oData.getFullYear();
	estruturarCalendario(objeto, sData);
}

function estruturarCalendario(objeto, data)
{
	//Estabelece as datas inicial e final.
	var aData = data.split("/");
	
	var dDate = new Date(parseInt(aData[2]), parseInt(aData[1] - 1), parseInt(aData[0]), 0, 0, 0, 0);
				
	var aDataSel = data.split("/");
	var dDateSel = new Date(parseInt(aDataSel[2]), parseInt(aDataSel[1] - 1), parseInt(aDataSel[0]), 0, 0, 0, 0);
	dDateSel.setHours(01,00,00,00);

	var dDataInicio = new Date(dDate.getFullYear(), dDate.getMonth(), 1, 0, 0, 0, 0);
	
	dDataInicio.setHours(01,00,00,00);
	
	var dDataFim = new Date(dDate.getFullYear(), dDate.getMonth(), 1, 0, 0, 0, 0);
	
	dDataFim.setHours(01,00,00,00);
	
	var iContador = 0;
	var oTable, oTr, oTd;

	oTable = document.createElement("table");
	
	dDataFim.setMonth(dDataFim.getMonth() + 1);
	dDataFim.setDate(dDataFim.getDate() - 1);

	while(dDataInicio.getDay() != 0)
		dDataInicio.setDate(dDataInicio.getDate() - 1);

	while(dDataFim.getDay() != 6)
		dDataFim.setDate(dDataFim.getDate() + 1);

	montarCabecalho(oTable);

	while(dDataInicio <= dDataFim)
	{
		if(iContador % 7 == 0)
		{
			oTr = document.createElement("tr");
			oTable.appendChild(oTr);
		}

		oTd = document.createElement("td");
		oTd.align = "center";
		if(dDataInicio.getDay() == 0 || dDataInicio.getDay() == 6)
			oTd.bgColor = "#E4E4E4";
		
		if(dDateSel.toString() == dDataInicio.toString())
			oTd.bgColor = "#B4B4B4";

		oTd.style.cursor = "pointer";
		oTd.setAttribute("onclick", "selecionarData('" + objeto + "'," + dDataInicio.getDate() + ", " + (dDataInicio.getMonth() + 1) + ", " + dDataInicio.getFullYear() + ")");
		oTd.innerHTML = dDataInicio.getDate();
		
		oTr.appendChild(oTd);

		dDataInicio.setDate(dDataInicio.getDate() + 1);
		iContador ++;
	}
	
	window.document.getElementById(objeto + "_cln").innerHTML = "<table>" + oTable.innerHTML + "</table>";
}

function montarCabecalho(tabela)
{
	var arrDiaSemana = new Array("dom", "seg", "ter", "qua", "qui", "sex", "sab");
	var oTr = document.createElement("tr");
	var oTd;
	
	tabela.appendChild(oTr);
	
	for(i = 0; i < arrDiaSemana.length; i++)
	{
		oTd = document.createElement("td");
		oTd.align = "center";
		oTd.innerHTML = "<b>" + arrDiaSemana[i] + "</b>";
		oTr.appendChild(oTd);
	}
}

function mudarData(objeto)
{
	var minhaData = window.document.getElementById(objeto + "_hid").value;
	
	var aData = minhaData.split("/");
	var oData = new Date(parseInt(aData[2]), parseInt(aData[1] - 1), parseInt(aData[0]), 0, 0, 0, 0);
	var sData;
	
	oData.setMonth(parseInt(window.document.getElementById(objeto + "_ddlMes").value));
	oData.setFullYear(parseInt(window.document.getElementById(objeto + "_txtAno").value));
	
	sData = oData.getDate() + "/" + (oData.getMonth() + 1) + "/" + oData.getFullYear();
	estruturarCalendario(objeto, sData);
}

function avancarData(objeto)
{
	var minhaData = window.document.getElementById(objeto + "_hid").value;
	
	var aData = minhaData.split("/");
	var oData = new Date(parseInt(aData[2]), parseInt(aData[1] - 1), parseInt(aData[0]), 0, 0, 0, 0);
	var sData;

	oData.setMonth(parseInt(window.document.getElementById(objeto + "_ddlMes").value) + 1);
	if(oData.getMonth() == 0)
		oData.setFullYear(parseInt(window.document.getElementById(objeto + "_txtAno").value) + 1);
	else
		oData.setFullYear(parseInt(window.document.getElementById(objeto + "_txtAno").value));

	window.document.getElementById(objeto + "_ddlMes").value = oData.getMonth();
	window.document.getElementById(objeto + "_txtAno").value = oData.getFullYear();

	sData = oData.getDate() + "/" + (oData.getMonth() + 1) + "/" + oData.getFullYear();
	estruturarCalendario(objeto, sData);
}

function recuarData(objeto)
{
	var minhaData = window.document.getElementById(objeto + "_hid").value;
	
	var aData = minhaData.split("/");
	var oData = new Date(parseInt(aData[2]), parseInt(aData[1] - 1), parseInt(aData[0]), 0, 0, 0, 0);
	var sData;

	oData.setMonth(parseInt(window.document.getElementById(objeto + "_ddlMes").value) - 1);
	if(oData.getMonth() == 11)
		oData.setFullYear(parseInt(window.document.getElementById(objeto + "_txtAno").value) - 1);
	else
		oData.setFullYear(parseInt(window.document.getElementById(objeto + "_txtAno").value));

	window.document.getElementById(objeto + "_ddlMes").value = oData.getMonth();
	window.document.getElementById(objeto + "_txtAno").value = oData.getFullYear();

	sData = oData.getDate() + "/" + (oData.getMonth() + 1) + "/" + oData.getFullYear();
	estruturarCalendario(objeto, sData);
}

function selecionarData(objeto, dia, mes, ano)
{
	var minhaData = dia + "/" + mes + "/" + ano;
	
	estruturarCalendario(objeto, minhaData);

	var dData = new Date(parseInt(ano), parseInt(mes) - 1, parseInt(dia), 0, 0, 0, 0);
	window.document.getElementById(objeto + "_ddlMes").value = dData.getMonth();
	window.document.getElementById(objeto + "_txtAno").value = dData.getFullYear();
	window.document.getElementById(objeto).value = minhaData;
	window.document.getElementById(objeto + "_hid").value = minhaData;
}