// FUNCIONES LAYERS PRA AYUDAS

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

//

function Isdate(strDate)
{	var Error = 0;
	var arrDate = strDate.split('/')
	if (arrDate.length < 3)
	{		return false
	}else
	{		var y = arrDate[2]
		var m = arrDate[1]
		var d = arrDate[0]
		if (d.length == 1)	d = '0' + d
		if (m.length == 1)	m = '0' + m
		if (y.length == 2)
		{			if (y > 49)
			{				y = '19' + y
			}else 
			{				y = '20' + y
			} 
		} 
		if (d.length != 2 || m.length != 2 || y.length != 4) return false
		//check the values
		if (isNaN(d) || d<0 || d.indexOf(',')!=-1 || d.indexOf('.')!=-1 || d.indexOf('-')!=-1) Error = 1
		if (isNaN(m) || m<0 || m.indexOf(',')!=-1 ||	m.indexOf('.')!=-1 || m.indexOf('-')!=-1) Error = 1
		if (isNaN(y) || y<0 || y.indexOf(',')!=-1 || y.indexOf('.')!=-1 || y.indexOf('-')!=-1) Error = 1
		if (m<1 || m>12) Error = 1
		if (d<1 || d>31) Error = 1
		if (y<1990 || y>2079) Error = 1
		//check months with 30 days
		if (m==4 || m==6 || m==9 || m==11)
		{			if (d==31) Error=1
		}
		// february, leap year
		if (m==2)
		{		// feb
			var feb=parseInt(y/4)
			if (isNaN(feb)) 
			{				Error=1
			}
			if (d>29) Error=1
			if (d==29 && ((y/4)!=parseInt(y/4))) Error=1
		}
		if (Error != 0) return false
	} 
	return true
}