function getEl(el) {
	return document.getElementById(el)
}

/*arrMandat: 1 - obrigatorio
			 2 - preencha um dos campos
			 3 - email
			 4 - email e obrigatorio */
function formCheck(suf) {
	if(!suf) suf='';
	else {
		arrFields=arrFields2;
		arrMandat=arrMandat2;
	}
	var result = true;
	for( var i = 0; i<arrFields.length; i++ ) {
		td = document.getElementById('td-'+arrFields[i]);
		el = document.getElementById(arrFields[i]);
		td.className = 'tdFormLabel';
		switch( arrMandat[i] ) {
			case 1:
				if( el.value == '' ) {
					result = false;
					td.className = 'tdFormLabel-error';
				}
				break;
				
			case 2:
				td2 = document.getElementById('td-'+arrFields[i+1])
				if( el.value == '' && el2.value == '' ) {
					result = false;
					td.className = 'tdFormLabel-error';
					td2.className = 'tdFormLabel-error';
				}
				else {
					td2.className = 'tdFormLabel';
				}
				i++;
				break;
				
			case 3:
				if( el.value != '' )
					if( !isEmail( el.value ) ) {
						result = false;
						td.className = 'tdFormLabel-error';
					}
				break;
				
			case 4:
				if( !isEmail( el.value ) ) {
					result = false;
					td.className = 'tdFormLabel-error';
				}
				break;
		}
	}
	document.getElementById('errorSpan'+suf).style.visibility = ( result ) ? 'hidden' : 'visible';
	return result;
}


/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "-";
var minYear=1900;
var maxYear=2100;

function isEmail(s) {
	return (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(new String(s)));
}

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strYear=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		//alert("O formato da data deve ser : mm-dd-yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert("Por favor introduza um mês válido")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert("Por favor introduza um dia válido")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("Por favor introduza um ano entre "+minYear+" e "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("Por favor introduza uma data válida")
		return false
	}
	return true
}

/*******************************************/

  function contador(input,counterInput,contadorMax) {
    var charLeft = contadorMax;
	if(input.value) {
        var str = replaces(input.value);
      charLeft = charLeft - str.length;
      if (charLeft<0) {
        input.value = str.slice(0,contadorMax);
        charLeft = 0;
      }
    }
    document.getElementById(counterInput).innerHTML = '[ Characters left: ' + charLeft + ' ]';
  }

 function replaces(string) {
        var strLength = string.length;
        if (strLength == 0) return string;

        var newStr = "";


        for(i=0; i<strLength; i++) {
            if(string.charAt(i) != '\r') {
                newStr += string.charAt(i);
            }
        }

        return newStr;
    }

function MM_swapImgRestore() { //v3.0
	  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
	}
	
	function MM_preloadImages() { //v3.0
	  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
		var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
		if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
	}
	
	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_swapImage() { //v3.0
	  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
	}

	function getElement(name) {
		return document.getElementById(name);
	}
	function openWindow(url, name, width, height) {
		var myLeft = (screen.width  - width) / 2;
		var myTop  = (screen.height - height) / 2;
		window.open(url, name, "height="+height+",width="+width+",left="+myLeft+",top="+myTop+",scrollbars=yes,status=no,toolbar=no,menubar=no,location=no")
	}
	function openWindowNamed(url, name) {
		window.open(url, name, "scrollbars=yes,resizable=yes,status=no,toolbar=no,menubar=no,location=no")
	}
	function openWindowEmpty(name) {
		window.open('', name, "scrollbars=yes,resizable=yes,status=yes,toolbar=no,menubar=no,location=no")
	}
	function openImage(url, name, width, height) {
		var myLeft = (screen.width  - width) / 2;
		var myTop  = (screen.height - height) / 2;
		window.open(url, name, "height="+height+",width="+width+",left="+myLeft+",top="+myTop+",scrollbars=no,status=no,toolbar=no,menubar=no,location=no")
	}
	function changeArte() {
		if (document.images && (preloadFlag == true)) {
			for (var i=0; i<changeArte.arguments.length; i+=2) {
	
				     document[changeArte.arguments[i]].filters.revealTrans.Transition = transValue;
				     document[changeArte.arguments[i]].filters.revealTrans.Apply();
					 document[changeArte.arguments[i]].src = changeArte.arguments[i+1];
				     document[changeArte.arguments[i]].filters.revealTrans.Play()
	
			}
		}
	}
	
function getkey(e)
{
if (window.event)
   return window.event.keyCode;
else if (e)
   return e.which;
else
   return null;
}

function goodchars(e, goods)
{
var key, keychar;
key = getkey(e);

if (key == null) return true;

// get character
keychar = String.fromCharCode(key);
keychar = keychar.toLowerCase();
goods = goods.toLowerCase();

//alert("KEY: " + key);

// check goodkeys
if (goods.indexOf(keychar) != -1)
	return true;

// control keys
if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 )
   return true;

// else return false
return false;
}