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(function() {
jQuery.support = {};
var root = document.documentElement,
script = document.createElement("script"),
div = document.createElement("div"),
id = "script" + now();
div.style.display = "none";
div.innerHTML = " <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
var all = div.getElementsByTagName("*"),
a = div.getElementsByTagName("a")[0];
// Can't get basic test support
if ( !all || !all.length || !a ) {
return;
}
jQuery.support = {
// IE strips leading whitespace when .innerHTML is used
leadingWhitespace: div.firstChild.nodeType === 3,
// Make sure that tbody elements aren't automatically inserted
// IE will insert them into empty tables
tbody: !div.getElementsByTagName("tbody").length,
// Make sure that link elements get serialized correctly by innerHTML
// This requires a wrapper element in IE
htmlSerialize: !!div.getElementsByTagName("link").length,
// Get the style information from getAttribute
// (IE uses .cssText insted)
style: /red/.test( a.getAttribute("style") ),
// Make sure that URLs aren't manipulated
// (IE normalizes it by default)
hrefNormalized: a.getAttribute("href") === "/a",
// Make sure that element opacity exists
// (IE uses filter instead)
// Use a regex to work around a WebKit issue. See #5145
opacity: /^0.55$/.test( a.style.opacity ),
// Verify style float existence
// (IE uses styleFloat instead of cssFloat)
cssFloat: !!a.style.cssFloat,
// Make sure that if no value is specified for a checkbox
// that it defaults to "on".
// (WebKit defaults to "" instead)
checkOn: div.getElementsByTagName("input")[0].value === "on",
// Make sure that a selected-by-default option has a working selected property.
// (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
optSelected: document.createElement("select").appendChild( document.createElement("option") ).selected,
// Will be defined later
checkClone: false,
scriptEval: false,
noCloneEvent: true,
boxModel: null
};
script.type = "text/javascript";
try {
script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
} catch(e) {}
root.insertBefore( script, root.firstChild );
// Make sure that the execution of code works by injecting a script
// tag with appendChild/createTextNode
// (IE doesn't support this, fails, and uses .text instead)
if ( window[ id ] ) {
jQuery.support.scriptEval = true;
delete window[ id ];
}
root.removeChild( script );
if ( div.attachEvent && div.fireEvent ) {
div.attachEvent("onclick", function click() {
// Cloning a node shouldn't copy over any
// bound event handlers (IE does this)
jQuery.support.noCloneEvent = false;
div.detachEvent("onclick", click);
});
div.cloneNode(true).fireEvent("onclick");
}
div = document.createElement("div");
div.innerHTML = "<input type='radio' name='radiotest' checked='checked'/>";
var fragment = document.createDocumentFragment();
fragment.appendChild( div.firstChild );
// WebKit doesn't clone checked state correctly in fragments
jQuery.support.checkClone = fragment.cloneNode(true).cloneNode(true).lastChild.checked;
// Figure out if the W3C box model works as expected
// document.body must exist before we can do this
jQuery(function() {
var div = document.createElement("div");
div.style.width = div.style.paddingLeft = "1px";
document.body.appendChild( div );
jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
document.body.removeChild( div ).style.display = 'none';
div = null;
});
// Technique from Juriy Zaytsev
// http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
var eventSupported = function( eventName ) {
var el = document.createElement("div");
eventName = "on" + eventName;
var isSupported = (eventName in el);
if ( !isSupported ) {
el.setAttribute(eventName, "return;");
isSupported = typeof el[eventName] === "function";
}
el = null;
return isSupported;
};
jQuery.support.submitBubbles = eventSupported("submit");
jQuery.support.changeBubbles = eventSupported("change");
// release memory in IE
root = script = div = all = a = null;
})();
jQuery.props = {
"for": "htmlFor",
"class": "className",
readonly: "readOnly",
maxlength: "maxLength",
cellspacing: "cellSpacing",
rowspan: "rowSpan",
colspan: "colSpan",
tabindex: "tabIndex",
usemap: "useMap",
frameborder: "frameBorder"
};
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