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() {
	var field = document.getElementById("hum_test");
	if(field != null){
		field.value = "1";
	}
}