//<![CDATA[
function enhanceCheckboxes() {
  var els=document.getElementsByTagName("input");
  for(var i=0; i < els.length; i++) {
    if (els[i].type=='checkbox') { 
        els[i].style.display='none';
         var img = document.createElement("img");
         if (els[i].checked) {
        img.src="./graphics/checked.gif";
        img.title="Checked";
      }
      else {
        img.src="./graphics/unchecked.gif";
        img.title="Unchecked";
      } 
        img.onclick= toggleCheckbox;
           els[i].parentNode.insertBefore(img, els[i]);
          }  
    }
}

function toggleCheckbox() {
  if (this.title == "Checked") {
    this.src="./graphics/unchecked.gif";
    this.title="Unchecked";
    this.nextSibling.checked=false;
     }
  else {
     this.src="./graphics/checked.gif";
    this.title="Checked";
    this.nextSibling.checked=true;
   }
}

function submitform()
{
 document.forms["tourform"].submit();
}


//]]>