function validatethis()
{
if(!document.getElementById) { return; }
var first_name = document.getElementById('first_name').value;
var last_name = document.getElementById('last_name').value;
var email = document.getElementById('email').value;
var telephone = document.getElementById('telephone').value;
var location = document.getElementById('location').value;
var enquiry = document.getElementById('enquiry').value;
var incorrect = new Array();
var no = 0;
var errtext = "";

 if(location === '') {
    incorrect[no] = 6;
    no++;
	errtext = "Please enter your location";
  }

if(first_name === '') {
    incorrect[no] = 5;
    no++;
	errtext = "Please enter your first name";
  }
    if(last_name === '') {
    incorrect[no] = 4;
    no++;
	errtext = "Please enter your last name";
  }
    if(email === '') {
    incorrect[no] = 3;
    no++;
	errtext = "Please enter your email";
  }
    if(telephone === '') {
    incorrect[no] = 2;
    no++;
	errtext = "Please enter your telephone number";
  }
      if(enquiry === '') {
    incorrect[no] = 1;
    no++;
	errtext = "Please enter your enquiry";
  }
  
  
 if(no > 0) {
   	document.getElementById('errors').innerHTML = "<span class=\"error\">" + errtext +"</span>";
return false;
 }  
}