function openNewWindow(URLtoOpen, windowName, windowFeatures) 
	{
		void(window.open(URLtoOpen, windowName, windowFeatures)); 
	}

function radiovalidation (entered, alertbox)
{   
	with (entered)
	{
		if (entered.length > 0) 
		{
			for(var n = 0; n < entered.length; n++)
			{
				if(entered[n].checked)
				{    
					return true;
				}
			}
			alert(alertbox);
			return false;
		}
		else
		{
			if(entered.checked)
			{
				return true;
			}
			else
			{
				alert(alertbox);
				return false;
			}
		}	
	}
}

function FechaInvalida(dia,mes,ano,alertbox)
{
		if (((mes.value==2)||(mes.value==4)||(mes.value==6)||(mes.value==6)||(mes.value==9)||(mes.value==11)) && (dia.value==31))
		{
		  alert(alertbox);
		  return true;	
		}
		else if ((mes.value==2)&& ((dia.value==30) || (dia.value==31)))
		{
		   alert(alertbox);
		   return true;		
		}
		else if (!((((ano.value%4)==0)&&((ano.value%100)!=0))||((ano.value%400)==0))&&dia.value==29 && mes.value==2)  
		{
			alert(alertbox);
			return true;
		}
		else{
			return false;
		}
	}


function emptyvalidation(entered, alertbox)
{
	with (entered)
	{
		if (value==null || value=="")
		{
			if (alertbox!="") 
			{
				alert(alertbox);
			} 
			return false;
		}
		else 
		{
			return true;
		}
	}
}

function nonumerico(entered, alertbox)
{
	with (entered)
	{
		if (isNaN(value)==true)
		{
			if (alertbox!="") 
			{
				alert(alertbox);
			} 
			return false;
		}
	}
}

function noentero(entered, alertbox)
{
	with (entered)
	{
		
		if (Math.floor(value)!= Math.ceil(value))
		{
			if (alertbox!="") 
			{
				alert(alertbox);
			} 
			return false;
		}
	}
}

function legthnvarchar(entered, alertbox,largo)
{
	with (entered)
	{
		if (value.length > largo)
		{
			if (alertbox!="") 
			{
				alert(alertbox + largo + " caracteres.");
			} 
			return false;
		}
	}
	return true;
}

function menulistvalidation (entered, alertbox)
{   
	with (entered)
	{
		for(var n = 1; n < entered.length; n++)
		{
			if(entered.options[n].selected)
				{    
					return true;
				}
		}
		alert(alertbox);
		return false;	
	}
}

function getmenulistvalue (entered)
{   
	with (entered)
	{
		for(var n = 1; n < entered.length; n++)
		{
			if(entered.options[n].selected)
				{    
					return entered.options[n].value;
				}
		}	
	}
}

function emailvalidation(campo, alertbox) 
{
		var entered = campo.value;
		var at="@";
		var dot=".";
		var lat=entered.indexOf(at);
		var lstr=entered.length;
		var ldot=entered.indexOf(dot);
		if (entered.indexOf(at)==-1){
		   alert(alertbox);
		   return false;
		}

		if (entered.indexOf(at)==-1 || entered.indexOf(at)==0 || entered.indexOf(at)==lstr){
		   alert(alertbox);
		   return false;
		}

		if (entered.indexOf(dot)==-1 || entered.indexOf(dot)==0 || entered.indexOf(dot)==lstr){
		    alert(alertbox);
		    return false;
		}

		 if (entered.indexOf(at,(lat+1))!=-1){
		    alert(alertbox);
		    return false;
		 }

		 if (entered.substring(lat-1,lat)==dot || entered.substring(lat+1,lat+2)==dot){
		    alert(alertbox);
		    return false;
		 }

		 if (entered.indexOf(dot,(lat+2))==-1){
		    alert(alertbox);
		    return false;
		 }
		
		 if (entered.indexOf(" ")!=-1){
		    alert(alertbox);
		    return false;
		 }
	 return true;
}

function getmenulistvalue (entered)
{   
	with (entered)
	{
		for(var n = 1; n < entered.length; n++)
		{
			if(entered.options[n].selected)
				{    
					return entered.options[n].value;
				}
		}	
	}
}

function writeWeekDate()
{
	var startDate;
	var endDate;
	var monthName = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
	var nowDate = new Date();
	var varDay = nowDate.getDay();
	var varDate = nowDate.getDate();
	var varMonth = nowDate.getMonth()
	if(varDay != 1)
	{
		startDate = varDate - (varDay - 1);
	}
	else
	{
		startDate = varDate;
	}
	endDate = startDate+4;
	var strFecha = monthName[varMonth] + ' ' + startDate + ' - ' + endDate; 
	document.write(strFecha);
}