function getErrorMessage(text, lang) {
	var messageStartES = 'El campo ';
	var messageStartEN = 'The field ';
	var messageStartBR = 'O campo ';
	var messageEndES = ' no fue completado correctamente.\n';
	var messageEndEN = ' was completed incorrectly.\n';
	var messageEndBR = ' não foi preenchido corretamente.\n';
	
	if(lang == 'en') {
		return messageStartEN + text + messageEndEN;
	} else if(lang == 'es') {
		return messageStartES + text + messageEndES;
	} else {
		return messageStartBR + text + messageEndBR;
	}
}

// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

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 isValidDate(dtStr){
	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strMonth=dtStr.substring(0,pos1);
	var strDay=dtStr.substring(pos1+1,pos2);
	var strYear=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("The date format should be : mm/dd/yyyy")
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert("Please enter a valid month")
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert("Please enter a valid day")
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("Please enter a valid date")
		return false;
	}
return true;
}

//@param separator String con el separador de Fecha pj. /
//@param type String con el tipo de Fecha:
//		1 => dd/mm/aaaa
//		2 => mm/dd/aaaa
//		3 => aaaa/mm/dd
function validateDate(name, nameToShow, lang, separator, type) {
	date = document.getElementsByName(name).item(0);
	if(date == null) {
		date = document.getElementById(name);
	}
	dateArray = date.value.split(separator);
	if(type == '1') {
		validDate = isValidDate(dateArray[1] + '/' + dateArray[0] + '/' + dateArray[2]);
	} else if(type == '2') {
		validDate = isValidDate(dateArray[0] + '/' + dateArray[1] + '/' + dateArray[2]);
	} else if(type == '3') {
		validDate = isValidDate(dateArray[1] + '/' + dateArray[2] + '/' + dateArray[0]);
	} else {
		alert('ERROR - Invalid Date Type');
		return false;
	}
	if(!validDate) {
		date.focus();
		alert(getErrorMessage(nameToShow, lang));
		return false;
	}
	return true;
}

function getObject(tag) {
	var obj = document.getElementById(tag);
	if(obj == null) {
		obj = document.getElementsByName(tag).item(0);
		if(obj == null) {
			return false;
		}
	} 
	return obj;
}

function validarSelect(name, nameToShow, nullValue, lang) {
	var combo = document.getElementsByName(name).item(0);
	if(combo == null) {
		combo = document.getElementById(name);
	}
	var selected = combo.selectedIndex;

	if(selected == -1 || combo.options[selected].value == nullValue) {
		combo.focus();
		alert(getErrorMessage(nameToShow, lang));
		return false;
	}
	return true;
}

function validateInteger(field, fieldName, lang){
	var obj = getObject(field);
	var value = obj.value;

	if(value == '') {
		obj.focus();
		alert(getErrorMessage(fieldName, lang));
		return false;
	} else if(!isInteger(value)) {
		var msg;
		if(lang == 'en') {
			msg = 'The field ' + fieldName + ' must be a number ';
		} else if(lang == 'es') {
			msg = 'El campo ' + fieldName + ' debe tener formato numérico';
		} else {
			msg = 'O campo ' + fieldName + ' deverá ser digitado no formato numérico';
		}
		obj.focus();
		alert(msg);
		return false;
	}
	return true;
}

function validateNumber(field, fieldName, lang) {
	var obj = getObject(field);

	var value = obj.value;
	if(value == '') {
		obj.focus();
		alert(getErrorMessage(fieldName, lang));
		return false;
	} else if(isNaN(value)) {
		var msg;
		if(lang == 'en') {
			msg = 'The field ' + fieldName + ' must be a number without commas and . as decimal separator';
		} else if(lang == 'es') {
			msg = 'El campo ' + fieldName + ' debe tener formato numérico sin comas y con . como separador decimal';
		} else {
			msg = 'O campo ' + fieldName + ' deverá ser digitado no formato numérico, sem a separação por vírgula, separando-se obrigat oriamente, a parte decimal com ponto.';
		}
		obj.focus();
		alert(msg);
		return false;
	}
	return true;
}

function checkWordLong(field, fieldName, long, lang) {
	obj = getObject(field);
	
	words = obj.value.split(' ');
	if(words.length >= long) {
		var msg;
		if(lang == 'en') {
			msg = 'The maximum size for ' + fieldName + ' field is '+ long;
		} else if(lang == 'es') {
			msg = 'El campo ' + fieldName + ' debe tener, como máximo, '+ long +' palabras';
		} else {
			msg = 'O tamanho máximo do campo ' + fieldName + ' é de '+ long +' palavras';
		}
		obj.focus();
		alert(msg);
		return false;
	}
	return true;
}

function checkMinimumCharLong(field, fieldName, long, lang) {
	var obj = getObject(field);
	
	var chars = obj.value;
	if(chars.length < long) {
		var msg;
		if(lang == 'en') {
			msg = 'The minimum size for ' + fieldName + ' field is '+ long +' characters';
		} else if(lang == 'es') {
			msg = 'El campo ' + fieldName + ' debe tener, como mínimo, '+ long +' caracteres';
		} else {
			msg = 'O tamanho mínimo do campo ' + fieldName + ' é de '+ long +' caráteres';
		}
		obj.focus();
		alert(msg);
		return false;
	}
	return true;
}

function checkCharLong(field, fieldName, long, lang) {
	var obj = getObject(field);
	
	var chars = obj.value;
	if(chars.length > long) {
		var msg;
		if(lang == 'en') {
			msg = 'The maximum size for ' + fieldName + ' field is '+ long +' characters';
		} else if(lang == 'es') {
			msg = 'El campo ' + fieldName + ' debe tener, como máximo, '+ long +' caracteres';
		} else {
			msg = 'O tamanho máximo do campo ' + fieldName + ' é de '+ long +' caráteres';
		}
		obj.focus();
		alert(msg);
		return false;
	}
	return true;
}

function validarPhone(valor) {
	var validChars = "0123456789/-";
	for (var i=0;i<valor.length;i++) {
		if (validChars.indexOf(valor.substring(i,i+1)) == -1){
			return false;
			}
		}
	return true;
}


function validarEmail(valor) {
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(valor)){
		return (true);
	} else {
		return (false);
	}
}

function validateField(field) {
	fieldLower = field.toLowerCase();
	value = document.getElementsByName(field).item(0).value;
	switch(fieldLower) {
		case 'email': return validarEmail(value); break;
		case 'e-mail': return validarEmail(value); break;
		case 'emailMatch': return validarEmail(value); break;
		
		case 'telefono': return validarPhone(value); break;
		case 'phone': return validarPhone(value); break;
		case 'fax': return validarPhone(value); break;
		
		default: return value.length != 0; break;
	}
}

function validateFormFields(fields, fieldsNames, lang) {
	var messageStartES = 'El campo ';
	var messageStartEN = 'The field ';
	var messageStartBR = 'O campo ';
	var messageEndES = ' no fue completado correctamente.\n';
	var messageEndEN = ' was completed incorrectly.\n';
	var messageEndBR = ' não foi preenchido corretamente.\n';

	for(var i=0; i<fields.length; i++) {
		if(!validateField(fields[i])) {
			document.getElementsByName(fields[i]).item(0).focus();
			alert(getErrorMessage(fieldsNames[i], lang));
			return false;
		}
	}
	return true;
}

function toggleBoxONOFF(szDivID) {
	if(document.getElementById(szDivID).style.display == 'block') {
		toggleBox(szDivID, 0);
	} else {
		toggleBox(szDivID, 1);
	}
}
function displayCheckStatus(szDivID) {
    if(document.layers)	{   //NN4+
       return document.layers[szDivID].display;
    } else if(document.getElementById)	{  //gecko(NN6) + IE 5+
        var obj = document.getElementById(szDivID);
		return obj.style.display;
    } else if(document.all) {	// IE 4
        return document.all[szDivID].style.display;
    }
}
function displayIsOn(szDivID) {
	return displayCheckStatus(szDivID)== "block";
}
function displayIsOff(szDivID) {
	return (displayCheckStatus(szDivID)== "none" || displayCheckStatus(szDivID)== "");
}
function toggleBox(szDivID, iState) // 1 visible, 0 hidden
{
    if(document.layers)	   //NN4+
    {
       document.layers[szDivID].display = iState ? "block" : "none";
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(szDivID);
		obj.style.display = iState ? "block" : "none";
    }
    else if(document.all)	// IE 4
    {
        document.all[szDivID].style.display = iState ? "block" : "none";
    }
}

function changeColorRow(id, class1, class2) {
	var row = document.getElementById(id);
	if(row.className == class1)
		row.className = class2;
	else
		row.className = class1;
}