/**
 * 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 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, t){
    var daysInMonth = DaysArray(12)
    var pos1=dtStr.indexOf(dtCh)
    var pos2=dtStr.indexOf(dtCh,pos1+1)
    var strDay=dtStr.substring(0,pos1)
    var strMonth=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("El formato de la fecha debe ser : dd/mm/yyyy")
        return false
    }
    if (strMonth.length<1 || month<1 || month>12){
        alert("Por favor ingrese un mes valido")
        return false
    }
    if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
        alert("Por favor ingrese un dia valido")
        return false
    }
    if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
        alert("Por favor ingrese una ano valido entre "+minYear+" y "+maxYear)
        return false
    }
    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
        alert("Por favor ingrese una fecha valida")
        return false
    }
            
    if(t == "f"){
        var myDate=new Date();
        myDate.setFullYear(year, month - 1, day);

        var today = new Date();

        if (myDate < today)
        {
            alert("Por favor ingrese una fecha valida");
            return false;
        }
    }
            
    return true
}

function ValidateForm(campo, t){
    var dt=document.getElementById(campo)
    if (isDate(dt.value, t) == false){
        dt.focus()
        return false
    }
    return true
}
        
var lwr = 'aábcdeéfghiíjklmnñoópqrstuúvwxyz ';
var upr = 'AÁBCDEÉFGHIÍJKLMNÑOÓPQRSTUÚVWXYZ';
var nums = '1234567890';
var signos = './"_()[],:+-?¡¿!%#*°';

function isValid(parm,val) {
    if (parm == "") return false;
    for (i=0; i<parm.length; i++) {
        if (val.indexOf(parm.charAt(i),0) == -1) return false;
    }
    return true;
}
        
function isAlpha(parm) {
    return isValid(parm,lwr+upr);
}

function isAlphaNum(parm) {
    return isValid(parm,lwr+upr+nums);
}

function isAlphaSig(parm) {
    return isValid(parm,lwr+upr+signos);
}

function isAlphaNumSig(parm) {
    return isValid(parm,lwr+upr+nums+signos);
}

function isNum(parm) {
    return isValid(parm,nums);
}

function isNumSig(parm) {
    return isValid(parm,nums+signos);
}

/**
 * DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    //alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

function radio_button_checker(radios){
	
	for (counter = 0; counter < radios.length; counter++){
		if (radios[counter].checked)
			return true;
	}
	
	return false;
}