var isEventSupported = (function(undef) {
var TAGNAMES = {
'select':'input',
'change':'input',
'submit':'form',
'reset':'form',
'error':'img',
'load':'img',
'abort':'img'
};
function isEventSupported(eventName, element) {
element = element || document.createElement(TAGNAMES[eventName] || 'div');
eventName = 'on' + eventName;
var isSupported = (eventName in element);
if (!isSupported) {
// if it has no `setAttribute` (i.e. doesn't implement Node interface), try generic element
if (!element.setAttribute) {
element = document.createElement('div');
}
if (element.setAttribute && element.removeAttribute) {
element.setAttribute(eventName, '');
isSupported = typeof element[eventName] == 'function';
// if property was created, "remove it" (by setting value to `undefined`)
if (typeof element[eventName] != 'undefined') {
element[eventName] = undef;
}
element.removeAttribute(eventName);
}
}
element = null;
return isSupported;
}
return isEventSupported;
})();
function divResult(category, name, element, div) {
div.innerHTML = div.innerHTML + category + " " + name + ": ";
div.innerHTML = div.innerHTML + (
isEventSupported(name, element)
? 'true'
: 'false'
);
div.innerHTML = div.innerHTML + "
";
}