// Generic cross-browser code for attaching events to elements
// You should really have this in a separate common JS file
var addEvent;
if (document.addEventListener) {
   addEvent = function(element, type, handler) {
   element.addEventListener(type, handler, null);
   if (element.href) element.href="javascript:void('');" ;
   }
}
else if (document.attachEvent) {
   addEvent = function(element, type, handler) {
     element.attachEvent("on" + type, handler);
     if (element.href) element.href="javascript:void('');" ;
   }
}
else {
   addEvent = new Function; // not supported
}
// Set up
addEvent(window, "load", setUpHumanTest, false);
function setUpHumanTest() {
   var myforms = document.getElementsByTagName("form") ;
   for (var i=0; i<myforms.length; i++) {
     addEvent(myforms[i], "focus", markAsHuman, false);
     addEvent(myforms[i], "click", markAsHuman, false);
   }
}

// Identify a human
function markAsHuman() {
   document.getElementById("iamhuman").value = "1";
}