/**************************************************************
IsTime: Returns a Boolean (true) if the Time is validated as a 
Time Format, false is not
Parameters:
strTime: String Time in following formats:
		hh:mm:ss tt - 3:48:01 PM
		hh:mm tt- 3:48 PM
		hh:mm- 15:48
Returns: Boolean
***************************************************************/


function IsTime(strTime) 
{
	var strTime1 = /^(\d{1,2})(\:)(\d{2})\2(\d{2})(\ )\w[AM|PM|am|pm]$/;
	var strTime2 = /^(\d{1,2})(\:)(\d{2})(\ )\w[A|P|a|p]\w[M|m]$/;
	var strTime3 = /^(\d{1,2})(\:)(\d{1,2})$/;
    	
	var strFormat1 = strTime.match(strTime1);
	var strFormat2 = strTime.match(strTime2);
	var strFormat3 = strTime.match(strTime3);
    if (strFormat1 == null && strFormat2 == null && strFormat3 == null) {
    	return false;
    }
    	else if (strFormat1 != null) {
        		if (strFormat1[1] > 12 || strFormat1[1] < 00) {
        			return false;
        		}
            	if (strFormat1[3] > 59 || strFormat1[3] < 00) {
            		return false;	
            	}
            	if (strFormat1[4] > 59 || strFormat1[4] < 00) {
            		return false;	
            	}
        }
        else if (strFormat2 != null) {
                if (strFormat2[1] > 12 || strFormat2[1] < 00) {
                	return false;
                }
            	if (strFormat2[3] > 59 || strFormat2[3] < 00) {
            		return false;	
            	}
        }
        else if (strFormat3 != null) {
                if (strFormat3[1] > 23 || strFormat3[1] < 00) {
                	return false;
                }
            	if (strFormat3[3] > 59 || strFormat3[3] < 00) {
            		return false;	
            	}
        }
	    return true;
}
	

function IsEmpty(aTextField) {
   if ((aTextField.value.length==0) ||
   (aTextField.value==null)) {
      return true;
   }
   else { return false; }
}
	

function IsNumeric(sText)
{
   var ValidChars = "0123456789.,";
   var IsNumber=true;
   var Char;
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   }

function validarhora(hora,campo){
   if ((!IsEmpty(campo)) && (!IsTime(hora)))
   	{ 
      alert('Debe introducir una hora valida') 
      return false; 
   	}
}


function isValidEmail(str) {
   return (str.indexOf(".") > 3) && (str.indexOf("@") > 0);
}

function emailCheck (emailStr) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("Ths username contains invalid characters.");
		return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("Ths domain name contains invalid characters.");
		return false;
	   }
	}

	if (user.match(userPat)==null) {
		alert("The username doesn't seem to be valid.");
		return false;
	}

	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Destination IP address is invalid!");
			return false;
	   }
	}
	return true;
	}
	 
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert("The domain name does not seem to be valid.");
		return false;
	   }
	}

	if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("The address must end in a well-known domain or two letter " + "country.");
		return false;
	}


	if (len<2) {
		alert("This address is missing a hostname!");
		return false;
	}

return true;
}