var phone_field_length=0;

function TabNext(obj,event,len,next_field) {
    if (event == "down") {
        phone_field_length=obj.value.length;
        }
    else if (event == "up") {
    if (obj.value.length != phone_field_length) {
        phone_field_length=obj.value.length;
        if (phone_field_length == len) {
            next_field.focus();
            }
        }
    }
}

    
function isDate(varDateToCheck) {
    
    var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/;
    
    /* is the format ik? */
    var matchArray = varDateToCheck.match(datePat); 
    
    if (matchArray == null) 
    {
        return false;
    }	
    month = matchArray[1]; // parse date into variables
    day = matchArray[3];
    year = matchArray[4];
    
    /* check month range */
    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) 
    { // check for february 29th
        var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
        if (day>29 || (day==29 && !isleap)) 
        {
            return false;
        }
    }
    return true;		
}

function IsNumNumeric(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 IsAlphaNumeric(sText)
{
   var ValidChars = "-0123456789.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz%$&@* ";
   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 IsPureAlphaNumeric(sText)
{
   var ValidChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz%$&@*";
   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 IsValidPassword(sText)
{
   var ValidChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
   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 isValidCreditCard(number) {
    var total = 0;
    var flag = 0;
    for (var i=(number.length - 1);i>=0; i--) {
        if (flag == 1) {
            var digits = number.charAt(i) * 2;
            if (digits > 9) digits -= 9;
            total += digits;
            flag = 0;
        } else {
            total = total + parseInt(number.charAt(i));
            flag = 1;
        }
    }
    if ((total%10) == 0) {
        return true;
    } else {
        return false;
    }
}


function isValidEmail(emailStrIn) {

    /* The following variable tells the rest of the function whether or not
    to verify that the address ends in a two-letter country or well-known
    TLD.  1 means check it, 0 means don't. */

    var emailStr = emailStrIn.toLowerCase();

    var checkTLD=1;

    var knownDomsPat=/^(com|net|org|us|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) {

        return false;
    }

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

    for (i=0; i<user.length; i++) {
        if (user.charCodeAt(i)>127) {
            return false;
        }
    }

    for (i=0; i<domain.length; i++) {
        if (domain.charCodeAt(i)>127) {
            return false;
        }
    }

    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 atomPat=new RegExp("^" + atom + "$");
    var domArr=domain.split(".");
    var len=domArr.length;

    for (i=0;i<len;i++) {
        if (domArr[i].search(atomPat)==-1) {
            return false;
        }
    }

    if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
        return false;
    }

    if (len<2) {
        return false;
    }

    return true;

}

function selecttab(id) {

   var tabtable=document.getElementById("featuretabs")
   tabs=tabtable.getElementsByTagName("td")

   var outerdiv=document.getElementById("featurecontent")
   innerdivs=outerdiv.getElementsByTagName("div")

   for (i=0; i<innerdivs.length; i++) {
       tabs[i].className = "inactive"
       innerdivs[i].className = "inactive"

   }

   tabs[id].className = "active"
   innerdivs[id].className = "active"


}

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/	
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};