// JavaScript Document


		function on_focus(valor){
			//alert('contenido del control: '+document.getElementById(valor).value+' parametro: '+valor);
			if (document.getElementById(valor).value == valor) {
				document.getElementById(valor).value = '';
				}
			if (valor == 'clave'){
				document.getElementById(valor).type = 'password';
				}
			}
			
		function on_blur(valor){
			if (document.getElementById(valor).value == '') {
				document.getElementById(valor).value = valor;
				if (document.getElementById(valor).type != 'textarea')
					document.getElementById(valor).type = 'text';
				}
			}


/* -------------------------------- */
/*          TRIM                    */
/* -------------------------------- */
function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}
/* -------------------------------- */

function checkMail(x)
{
var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)){
		return true;
	}
return false;
}


/* -------------------------------- */
// Validacion de numeros Reales, aceptando una coma decimal (podria hacerse un ALERT cuando usa el punto (.))
function validar_numero_real(e, id){
	
	var tecla = (document.all) ? e.keyCode : e.which;
	var str = document.getElementById(id).value;

	if (tecla == 44) { 
		alert('Use (.) como separador decimal!'); 
		if (str.indexOf(".") == -1) {
			document.getElementById(id).value = document.getElementById(id).value + '.';
			}
		}
	
	if ((tecla < 48 || tecla > 57 ) && (tecla != 46) && (tecla != 8) && (tecla != 0) && (tecla != 13)){
		return false;
		}
	else{
		// Controlo que el punto este solo una vez
		if ((tecla == 46)&&(str.indexOf(".") != -1)) {
			alert('El simbolo decimal ya fue ingresado!');	
			return false;			
			}
		else {	
			return true;
			}
		}
	}
/* -------------------------------- */

/* -------------------------------- */
function validar_enter(e){
	var tecla = (document.all) ? e.keyCode : e.which;
	return (tecla == 13);
	}
/* -------------------------------- */	

function ocultar_div(id){
	var div = document.getElementById(id);
	div.style.display = 'none';
	}


/* -------------------------------- */	
/* -------------------------------- */	
function getInnerText(elt) {
	var _innerText = elt.innerText;
	if (_innerText == undefined) {
  		_innerText = elt.innerHTML.replace(/<[^>]+>/g,"");
	}
	return _innerText;
}

function setInnerText(elt, text) {
	var _innerText = elt.innerText;
	if (_innerText == undefined) {
  		elt.innerHTML = text;
		}
	else {
		elt.innerText = text;
		}
	return true;
}
/* -------------------------------- */
/* -------------------------------- */


/* -------------------------------- */	
function stripHTML(text_area){
	
	var re= /<\S[^><]*>/g;
	var cont = text_area.value.replace(re, "");
	return cont.replace(/&nbsp;/g,"")
	
	}


function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}

function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}



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){
	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("The date format should be : yyyy/mm/dd")
		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
}