/*-----------------------------------------------------------------------------
POWERED BY EXPERTWEB

Inglaterra 1209 y Av Republica, Quito-Ecuador
(593 2) 246-1506, (593 9) 956-3284
www.expertweb.com.ec
info@expertweb.com.ec
-----------------------------------------------------------------------------*/

function trim(str) {
	if ((typeof str == 'undefined') || (str == null)) return '';

	var ln = str.length;
	var st = 0;

	while ((st < ln) && (str.charAt(st) <= ' ')) {
	    st++;
	}
	while ((st < ln) && (str.charAt(ln - 1) <= ' ')) {
	    ln--;
	}
	return ((st > 0) || (ln < str.length)) ? str.substring(st, ln) : str;
}

function isEmpty(str) {
	if ((typeof str == 'undefined') || (str == null)) return true;
	var s = trim(str);
	return s.length == 0 ? true: false;
}

function isNotEmpty(str) {
	return !isEmpty(str);
}

function isNumber(str) {
	if (isEmpty(str)) return false;

    var chars = str;
	var sz = chars.length;
    var hasExp = false;
    var hasDecPoint = false;
    var allowSigns = false;
    var foundDigit = false;

	var start = chars.charAt(0) == '-' ? 1: 0;
	
    if (sz > start + 1) {
	    if (chars.charAt(start) == '0' && chars.charAt(start + 1) == 'x') {
			var i = start + 2;
            if (i == sz) {
            	return false; // str == "0x"
            }
            //Checking hex (it can't be anything else)
            for (; i < chars.length; i++) {
            	if ((chars.charAt(i) < '0' || chars.charAt(i) > '9') && (chars.charAt(i) < 'a' || chars.charAt(i) > 'f') && (chars.charAt(i) < 'A' || chars.charAt(i) > 'F')) {
                	return false;
                }
            }
            return true;
        }
    }
    
	sz--; //Don't want to loop to the last char, check it afterwords for type qualifiers
	var i = start;
	//Loop to the next to last char or to the last char if we need another digit to
    //make a valid number (e.g. chars[0..5] = "1234E")
	while (i < sz || (i < sz + 1 && allowSigns && !foundDigit)) {
    	if (chars.charAt(i) >= '0' && chars.charAt(i) <= '9') {
        	foundDigit = true;
        	allowSigns = false;
		} else if (chars.charAt(i) == '.') {
			if (hasDecPoint || hasExp) {
				//Two decimal points or dec in exponent
				return false;
			}
			hasDecPoint = true;
		} else if (chars.charAt(i) == 'e' || chars.charAt(i) == 'E') {
			//We've already taken care of hex.
			if (hasExp) {
            	//Two E's
            	return false;
            }
            if (!foundDigit) {
            	return false;
            }
            hasExp = true;
            allowSigns = true;
        } else if (chars.charAt(i) == '+' || chars.charAt(i) == '-') {
			if (!allowSigns) {
				return false;
            }
            allowSigns = false;
            foundDigit = false; //We need a digit after the E
        } else {
            return false;
        }
        i++;
    }
	if (i < chars.length) {
		if (chars.charAt(i) >= '0' && chars.charAt(i) <= '9') {
			//No type qualifier, OK
			return true;
		}
		if (chars.charAt(i) == 'e' || chars.charAt(i) == 'E') {
			//Can't have an E at the last byte
			return false;
		}
		if (!allowSigns	&& (chars.charAt(i) == 'd'	|| chars.charAt(i) == 'D'	|| chars.charAt(i) == 'f'	|| chars.charAt(i) == 'F')) {
			return foundDigit;
		}
		if (chars.charAt(i) == 'l'	|| chars.charAt(i) == 'L') {
			//Not allowing L with an exponoent
			return foundDigit && !hasExp;
		}
	}
	//allowSigns is true iff the val ends in 'E'
	//Found digit it to make sure weird stuff like '.' and '1E-' doesn't pass
	
	return !allowSigns && foundDigit;
}

function isDate(str) {
	var datePattern = /^(\d{4})(\/|-)(\d{1,2})\2(\d{1,2})$/;	// yyyy-mm-dd
	
	if (isEmpty(str)) return false;
	
	var dateStr = trim(str);
	var matchArray = dateStr.match(datePattern);
	
	if (matchArray == null) return false;
	
	year = matchArray[1];
	month = matchArray[3];
	day = matchArray[4];
		
	if (month < 1 || month > 12)
		return false;
	if (day < 1 || day > 31)
		return false;
	if ((month==4 || month==6 || month==9 || month==11) && day==31)
		return false;
	if (month == 2) {
		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
			if (day>29 || (day==29 && !isleap))
				return false;
	}
	return true;
}

function isEmail(str) {
	var emailPat=/^(.+)@(.+)$/;
	var specialChars = "\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
	var validChars = "\[^\\s" + specialChars + "\]";
	var quotedUser = "(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom = validChars + '+';
	var word = "(" + atom + "|" + quotedUser + ")";
	var userPat = new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat = new RegExp("^" + atom + "(\\." + atom +")*$");

	if (isEmpty(str)) return false;
	
	var emailStr = trim(str);
	var matchArray = emailStr.match(emailPat);
	if (matchArray == null) return false;

	var user = matchArray[1];
	var domain = matchArray[2];

	if (user.match(userPat)==null) return false;

	var IPArray = domain.match(ipDomainPat);
	if (IPArray != null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255)
				return false;
    	}
    	return true;
	}

	var domainArray = domain.match(domainPat);
	if (domainArray == null)
		return false;

	var atomPat = new RegExp(atom,"g")
	var domArr = domain.match(atomPat)
	var len = domArr.length
	
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3)
		return false;

	if ( len < 2 )
		return false;

	return true;
}

function inRange(num, rmin, rmax) {
	return ((num >= rmin) && (num <= rmax));
}


function disableSubmit(form) {
	for (i=0; i<form.length; i++) {
		var tempobj = form.elements[i];
		if (tempobj.type.toLowerCase()=="submit" || tempobj.type.toLowerCase()=="reset")
			tempobj.disabled = true
	}
}

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_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_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];}
}
// JavaScript Document