function ValidField(p_fld, p_sName, p_sType, p_bRequired, p_vLower, p_vUpper) {
	var sMsg = '';

	if (p_bRequired) {
		if (p_fld.value == '') {
			sMsg = p_sName;
			alert(sMsg);
			p_fld.focus();
			p_fld.select();
			return 0;
		}
	}
	if (p_fld.value != '') {
		if (p_sType == 'Integer') {
			if (! ValidInteger(p_fld.value, p_vLower, p_vUpper))
				sMsg = p_sName + ' must be a whole number between ' + p_vLower + ' and ' + p_vUpper + '.';
		}
		if (p_sType == 'Float') {
			if (! ValidFloat(p_fld.value, p_vLower, p_vUpper))
				sMsg = p_sName + ' must be a number between ' + p_vLower + ' and ' + p_vUpper + '.';
		}
		if (p_sType == 'Date') {
			if (! ValidDate(p_fld.value))
				sMsg = p_sName + ' must be a valid date in the format DD/MM/YYYY.';
		}
		if (p_sType == 'DayMonth') {
			if (! ValidDate(p_fld.value + '/1000'))
				sMsg = p_sName + ' must be a valid date in the format DD/MM.';
		}
		if (p_sType == 'Time') {
			if (! ValidTime(p_fld.value))
				sMsg = p_sName + ' must be a valid time in the 24 hour format HH:MM.';
		}
	}
	if (sMsg != '') {
		alert(sMsg);
		p_fld.focus();
		p_fld.select();
		return 0;
	}
	return 1;
}

function ValidEMail(sEmail, bAllowEmpty) {
var sMsg = '';
if ((bAllowEmpty == true) && (sEmail.length == 0))
	{
		sMsg = ' The Email address is required.';
	}
if (sEmail.length < 5)	
	{ 
		sMsg = ' The Email address must be longer than 5 characters.';
	}
 if (sEmail.length > 100) 
	{ 
		sMsg = ' The Email address may not be longer than 100 characters.';
	}
 if ( sEmail.indexOf('@') == -1 ||sEmail.indexOf('.') == -1) 
	{ 
		sMsg = ' The Email address must contain a @ character.';
	}
 if ( sEmail.indexOf('@') != sEmail.lastIndexOf('@'))
	{ 
		sMsg = ' The Email address must contain a @ character.';
	}
 if ( sEmail.lastIndexOf('@') > sEmail.lastIndexOf('.'))
	{ 
		sMsg = ' The Email address requires a Domain Name. (eg. vivejewellery.com).';
	}
 if (sEmail.indexOf('@') == 0 || sEmail.indexOf('.') == 0)
	{ 
		sMsg = ' The Email address must contain a @ character.';
	}
 if (sEmail.indexOf('@') == (sEmail.length - 1) || sEmail.indexOf('.') == (sEmail.length - 1))
	{ 
		sMsg = ' The Email address requires a Domain Name. (eg. vivejewellery.com) ';
	}
	
	if (sMsg != '')
	{
		alert(sMsg);
		return 0;
	}
	return 1;
}

function FormOnSubmit() {
if (document.form1.title.selectedIndex ==0 )   {alert ('Please select your Title');	return false;}
if (! ValidField(document.form1.fullname, 'Please Fill in Your Full Name', 'Text', true, 0, 0)) return false;
if (! ValidField(document.form1.tel, 'Please Fill in Your Telephone Number', 'Text', true, 0, 0)) return false;
if (! ValidEMail(document.form1.email.value, true)) { return false; }
if (! ValidField(document.form1.comments, 'Please Fill in your Comments,Message or Enquiry', 'Text', true, 0, 0)) return false;
return true;
}

<!-- END OF FORM-1 VALIDATION -->