/**
	  * This function takes a string and builds it.
	  * to the user. Because some of the messages can be built at runtime with variable text, the
	  * function checks for all instances of {0}, {1} in the string and replaces them with DYNAMICF function
	  * parameters got by the javascript function 'arguments'
	*/
	function buildMessage(message){


		// if number of params > 1, then replace the tokens
		var paramCount = buildMessage.arguments.length;

		if (paramCount > 1){
			// Loop through all the parameters ans replace the {0,1} tokens with parameter values
			for (var i = 1 ; i < paramCount ; i++){
				var replaceToken = "{" + (i - 1) + "}";
				message = message.replace(replaceToken,buildMessage.arguments[i]);
			}
		}

		// show error message
		return message;

	}



	function isStringContainingInvalidCharacters(str, invalidCharacters){

		// make sure both strings are not null and non empty
		if ( ((str == null) || (str == ""))  || ((invalidCharacters == null) || (invalidCharacters == ""))){
			return false;
		}

		// loop through the invalid characters and test them one by one!
		for (var i = 0 ; i < invalidCharacters.length ; i++){
			var aInvalidChar = invalidCharacters.charAt(i);
			var foundInvalidPos = str.indexOf(aInvalidChar);
			if ( foundInvalidPos != -1){
				// here, we have found an invalid char, leave the proc
				return true;
			}
		}

		return false;   // no invalid char found!
	}

	function emailCheck(emailStr) {
		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]
		if (user.match(userPat)==null) {
			return false
		}
		var IPArray=domain.match(ipDomainPat);
		//alert("Tried to recognize domain '"+domain+"' as IP address: "+IPArray+" using pattern '"+ipDomainPat+"'");
		if (IPArray != null) {
			for (var i = 1; i <= 4; i++) {
				if (parseInt(IPArray[i]) > 255) {
					return false;
				}
			}
			return IPArray.length == 5;
		}
		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 > 4) {
			return false
		}
		if (len < 2) {
			return false
		}
		return true;
	}