function CheckFields(){
var gobabygo = true;

if (document.form.owner_first_name.value == "")   //if 1
{
alert("Please enter your first name.");
    document.form.owner_first_name.focus();
    gobabygo = false;
}
else {

	if (document.form.owner_surname.value == "")   //if 2
	{
	alert("Please enter your surname.");
	    document.form.owner_surname.focus();
	    gobabygo = false;
	}
	else {


	//this is a comment
           //you didn't expect any help did you?

		
	                
				if (document.form.address.value == "")   //if 4
				{
				alert("Please enter your address.");
				    document.form.address.focus();
				    gobabygo = false;
	                        }
	                        else
				{
						
					if (document.form.town.value == "")   //if 5
					{
				         alert("Please enter your town.");
					 document.form.town.focus();
					 gobabygo = false;
	                        }
	                              else
				      				{
				      						
				      					if (document.form.postcode.value == "")   //if 6
				      					{
				      				         alert("Please enter your post code.");
				      					 document.form.postcode.focus();
				      					 gobabygo = false;
	                        }
	                        else
					                {
					                if (document.form.owner_telephone_no.value == "")   //if 3
										{
										alert("Please enter your telephone number.");
										    document.form.owner_telephone_no.focus();
										    gobabygo = false;
										    
								    
					                }
			
	                

	} //end 
if (gobabygo == true)
{

document.form.submit()
}
}
}
}
} //end 

}