function swapImage(){
	var image = document.getElementById("imageToSwap");
	var dropd = document.getElementById("item");
	image.src = 'images/formprev/formprev-'
	image.src = image.src += dropd.value;
	image.src = image.src += '.jpg';	
}

function checkForm(form) 
	{ 
	// validation fails if the input is blank 
	if (form.customername.value == '' || form.customername.value == 'Name') { 
		alert("Error: Please enter your name"); 
		form.customername.focus();  
		return false;  
		}
	if (form.customerphone.value == '' || form.customerphone.value == 'Phone') { 
		alert("Error: Please enter your Phone number"); 
		form.customerphone.focus();  
		return false;  
		}
	if (form.customermessage.value == '' || form.customername.value == 'Message') { 
		alert("Error: Please enter a message"); 
		form.customermessage.focus();  
		return false;  
		} 
	if (form.item.value == 'default') { 
		alert("Error: Please select an item you are interested in"); 
		form.item.focus();  
		return false;  
		} 
	
	// regular expression to match only email 
	var re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,})+$/;; 
	// validation fails if the input doesn't match our regular expression 
	if (!re.test(form.customeremail.value)) { 
		alert("Error: Please enter a valid email"); 
		form.customeremail.focus();  
		return false;  
		} 
	// validation was successful  
	
	return true;  }