<!--
	function validate_form() {		

		if (check_valid_essential_contents(document.Join_Form.Name.value) != true){
			alert("Please complete a valid Contact Name");
			self.document.Join_Form.Name.focus();
			return false;			
		}	
		
		if (check_valid_essential_contents(document.Join_Form.Organisation.value) != true){
			alert("Please complete a valid Organisation");
			self.document.Join_Form.Organisation.focus();
			return false;			
		}
		
		if (check_valid_nonessential_contents(document.Join_Form.Address.value) != true){
			alert("Please complete a valid Address");
			self.document.Join_Form.Address.focus();
			return false;			
		}	
		
		if (trim(document.Join_Form.Email.value) !== "") {
			if (check_valid_email_contents(document.Join_Form.Email.value) != true){			
				self.document.Join_Form.Email.focus();
				return false;
			}	
		}
		
		if (trim(document.Join_Form.Website.value) !== "") {
			if (check_valid_web_contents(document.Join_Form.Website.value) != true){			
				alert("Please complete a valid Website address");
				self.document.Join_Form.Website.focus();
				return false;
			}
		}
		
		if (check_valid_nonessential_contents(document.Join_Form.Description.value) != true){
			alert("Please complete a valid Description");
			self.document.Join_Form.Description.focus();
			return false;			
			
		}
		
		if (check_valid_essential_contents(document.Join_Form.Username.value) != true){
			alert("Please complete a valid Username");
			self.document.Join_Form.Username.focus();
			return false;			
		}
		
		if (check_valid_essential_contents(document.Join_Form.Password.value) != true){
			alert("Please complete a valid Password");
			self.document.Join_Form.Password.focus();
			return false;			
		}
	}
	
	function check_valid_web_contents(inputbox) {		
		var teststring1
		teststring1  = trim(inputbox.toString())
		if (inputbox == "") {
			return true
		}
		if (isblank(teststring1)) {
			return true
		}
		if (!isNaN(teststring1)) {
			return false
		}	
		if (teststring1.length < 4) {
			return false
		}		
		teststring2 = teststring1.substr(0, 4);
		teststring3 = teststring1.substr(0, 11); 
		if ((teststring2.toLowerCase() != "www.") & (teststring3.toLowerCase() != "http://www.")) {
			return false
		}
		if ((teststring2.toLowerCase() == "www.") & (teststring1.indexOf('.', 5) == -1)) {		
			return false
		}
		if ((teststring3.toLowerCase() == "http://www.") & (teststring1.indexOf('.', 12) == -1)) {
			return false
		}
		return true
	}
	
	function check_valid_email_contents(inputbox) {
			if (inputbox == "") {
				alert("Please complete a valid Email Address");
				return false
			}
			
			var teststring; 
			var outputstring; 

			teststring = trim(inputbox.toString())
			
			if (isblank(teststring)) {
				alert("Please complete a valid Email Address");
				return false
			}		

			// Convert inputbox to string			
			
			outputstring = removeblank(teststring)

			// Check for at least 7 chrs

			if (outputstring.length <= 6){
				alert("The email address you have entered is not in a valid format");				
				return false;
			}

			// Check for Illegal Characters

			var illegalchrs = new Array("*","Ł","$","!")

			var counter
	
			for (counter=0; counter <= illegalchrs.length; counter++){
				if (outputstring.indexOf(illegalchrs[counter]) != -1){
				alert("You have entered an invalid character in your email address");				
				return false;
				}				
			}

			// Check for the @ and the dots


			// First check that they both exist

			var atpositionback = outputstring.lastIndexOf("@")

			var dotpositionback = outputstring.lastIndexOf(".")

			var atpositionfront = outputstring.indexOf("@")


			if (atpositionback == -1){
				alert("The email address you have entered is not in a valid format");				
				return false;
			}

			if (dotpositionback == -1){
				alert("The email address you have entered is not in a valid format");				
				return false;
			}

			if (atpositionfront != atpositionback){
				alert("The email address you have entered is not in a valid format");				
				return false;
			}

			if (atpositionback > dotpositionback){
				alert("The email address you have entered is not in a valid format");				
				return false;
			}				
		return true
	}	
		
	function check_valid_nonessential_contents(inputbox) {
		var teststring
		var outputstring		
		teststring = trim(inputbox.toString())
		if (inputbox == "") {
			return true
		}
		if (isblank(teststring)) {
			return true
		}
		outputstring = removeblank(teststring)	
		if (!isNaN(outputstring)) {
			return false
		}
		if (outputstring.length < 2) {
			return false
		}			
		return true
	}		
		
	function check_valid_essential_contents(inputbox) {
		var teststring
		var outputstring		
		teststring = trim(inputbox.toString())
		if (inputbox == "") {
			return false
		}
		if (isblank(teststring)) {
			return false
		}
		outputstring = removeblank(teststring)	
		if (!isNaN(outputstring)) {
			return false
		}
		if (outputstring.length < 2) {
			return false
		}			
		return true
	}	
		
	
	function isblank(inbox) {
		for (var i = 0; i <  inbox.length; i++) {
			var c = inbox.charAt(i)
			if (c != " "){		
				return false;
			}
		}
		return true
	}
	
	function removeblank(inbox) {
		var output = ""
		for( var i = 0; i <  inbox.length; i++) {
			var c = inbox.charAt(i)
			if (c != " "){		
				output = output + c			
			}
		}
		return output
	}
	
	function trim(str) {	
   		return str.replace(/^\s*|\s*$/g,"");
	}

//-->