function checkForm(form)
{
	var reval = true;
	var errortxt = '';
	var bFocus = false;
			
	if (form.vcFirstName.value.length < 2) {
		errortxt+="Please enter your first name.\n";
		reval = false;
		if (!bFocus) { form.vcFirstName.focus(); bFocus=true; }
	}
	
	if (form.vcLastName.value.length < 2) {
		errortxt+="Please enter your last name.\n";
		reval = false;
		if (!bFocus) { form.vcLastName.focus(); bFocus=true; }
	}
			
	if ((form.vcEmail.value.length < 5) && (form.vcTelephone.value.length < 5) && (form.vcFax.value.length < 5) && (form.vcAddress.value.length < 5)) {
		errortxt+="If you want us to contact you, please enter an email address, telephone number, fax number or address.\n";
		reval = false;
	}
	
	if ((form.vcEmail.value.length > 4) && !(echeck(form.vcEmail.value))) {
		errortxt+="Please enter a valid email address.\n";
		reval = false;
		if (!bFocus) { form.vcEmail.focus(); bFocus=true; }
	}
	
	if (form.txtEnquiry.value.length < 5) {
		errortxt+="Please enter your enquiry.\n";
		reval = false;
		if (!bFocus) { form.txtEnquiry.focus(); bFocus=true; }
	}
					
	if(!reval){alert(errortxt)}
	return reval;
}

function echeck(str) {
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	if (str.indexOf(at)==-1){ return false; }
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){ return false; }
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){ return false; }
	if (str.indexOf(at,(lat+1))!=-1){ return false; }
	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){ return false; }
	if (str.indexOf(dot,(lat+2))==-1){ return false; }
	if (str.indexOf(" ")!=-1){ return false; }
	return true;					
}