function checkform(contactform){
	if(contactform.firstname.value==""){
		contactform.firstname.focus();
		document.images.formfirstname.src = "images/form_error.gif";
		return false;
	}else{
		document.images.formfirstname.src = "images/blank.gif";
	}
	
	if(contactform.company.value==""){
	contactform.company.focus();
	document.images.formcompany.src = "images/form_error.gif";
		return false;
	}else{
		document.images.formcompany.src = "images/blank.gif";
	}
	
	
	if(contactform.email.value==""){
		contactform.email.focus();
		document.images.formemail.src = "images/form_error.gif";
		return false;
	}else{
		document.images.formemail.src = "images/blank.gif";
	}
	
	if(contactform.email.value!=""){
		var re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,})+$/;
		if(!re.test(contactform.email.value)){
			contactform.email.focus();
			document.images.formemail.src = "images/form_error.gif";
			return false;
		}else{
			document.images.formemail.src = "images/blank.gif";
		}
	}
	
	if(contactform.tel.value==""){
		contactform.tel.focus();
		document.images.formtel.src = "images/form_error.gif";
		return false;
	}else{
		document.images.formtel.src = "images/blank.gif";
	}
	
	if(contactform.enquiry.value==""){
		contactform.enquiry.focus();
		document.images.formenquiry.src = "images/form_error.gif";
		return false;
	}else{
		document.images.formenquiry.src = "images/blank.gif";
	}

	
}