| Respuesta: CSS validar para todos los navegadores
pues inserto el código creado por Modernizr y no cambia el background. incluso cambia de posición un div.
el código inserto en el head es el siguiente:
/* Modernizr 2.8.1 (Custom Build) | MIT & BSD
* Build: http://modernizr.com/download/#-multiplebgs-cssgradients-addtest-prefixed-teststyles-testprop-testallprops-hasevent-prefixes-domprefixes
*/
;
window.Modernizr = (function( window, document, undefined ) {
var version = '2.8.0',
Modernizr = {},
docElement = document.documentElement,
mod = 'modernizr',
modElem = document.createElement(mod),
mStyle = modElem.style,
inputElem ,
toString = {}.toString,
prefixes = ' -webkit- -moz- -o- -ms- '.split(' '),
omPrefixes = 'Webkit Moz O ms',
cssomPrefixes = omPrefixes.split(' '),
domPrefixes = omPrefixes.toLowerCase().split(' '),
tests = {},
inputs = {},
attrs = {},
classes = [],
slice = classes.slice,
featureName,
injectElementWithStyles = function( rule, callback, nodes, testnames ) {
var style, ret, node, docOverflow,
div = document.createElement('div'),
body = document.body,
fakeBody = body || document.createElement('body');
if ( parseInt(nodes, 10) ) {
while ( nodes-- ) {
node = document.createElement('div');
node.id = testnames ? testnames[nodes] : mod + (nodes + 1);
div.appendChild(node);
}
}
style = ['','<style id="s', mod, '">', rule, '</style>'].join('');
div.id = mod;
(body ? div : fakeBody).innerHTML += style;
fakeBody.appendChild(div);
if ( !body ) {
fakeBody.style.background = '';
fakeBody.style.overflow = 'hidden';
docOverflow = docElement.style.overflow;
docElement.style.overflow = 'hidden';
docElement.appendChild(fakeBody);
}
ret = callback(div, rule);
if ( !body ) {
fakeBody.parentNode.removeChild(fakeBody);
docElement.style.overflow = docOverflow;
} else {
div.parentNode.removeChild(div);
}
return !!ret;
},
isEventSupported = (function() {
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 ( !element.setAttribute ) {
element = document.createElement('div');
}
if ( element.setAttribute && element.removeAttribute ) {
element.setAttribute(eventName, '');
isSupported = is(element[eventName], 'function');
if ( !is(element[eventName], 'undefined') ) {
element[eventName] = undefined;
}
element.removeAttribute(eventName);
}
}
element = null;
return isSupported;
}
return isEventSupported;
})(),
_hasOwnProperty = ({}).hasOwnProperty, hasOwnProp;
if ( !is(_hasOwnProperty, 'undefined') && !is(_hasOwnProperty.call, 'undefined') ) {
hasOwnProp = function (object, property) {
return _hasOwnProperty.call(object, property);
};
}
else {
hasOwnProp = function (object, property) {
return ((property in object) && is(object.constructor.prototype[property], 'undefined'));
};
}
if (!Function.prototype.bind) {
Function.prototype.bind = function bind(that) {
var target = this;
if (typeof target != "function") {
throw new TypeError();
}
var args = slice.call(arguments, 1),
bound = function () {
if (this instanceof bound) {
var F = function(){};
F.prototype = target.prototype;
var self = new F();
var result = target.apply(
self,
args.concat(slice.call(arguments))
);
if (Object(result) === result) {
return result;
}
return self;
} else {
return target.apply(
that,
args.concat(slice.call(arguments))
);
}
};
return bound;
};
}
function setCss( str ) {
mStyle.cssText = str;
}
function setCssAll( str1, str2 ) {
return setCss(prefixes.join(str1 + ';') + ( str2 || '' ));
}
function is( obj, type ) {
return typeof obj === type;
}
function contains( str, substr ) {
return !!~('' + str).indexOf(substr);
}
function testProps( props, prefixed ) {
for ( var i in props ) {
var prop = props[i];
if ( !contains(prop, "-") && mStyle[prop] !== undefined ) {
return prefixed == 'pfx' ? prop : true;
}
}
return false;
}
function testDOMProps( props, obj, elem ) {
for ( var i in props ) {
var item = obj[props[i]];
if ( item !== undefined) {
if (elem === false) return props[i];
if (is(item, 'function')){
return item.bind(elem || obj);
}
return item;
}
}
return false;
}
function testPropsAll( prop, prefixed, elem ) {
var ucProp = prop.charAt(0).toUpperCase() + prop.slice(1),
props = (prop + ' ' + cssomPrefixes.join(ucProp + ' ') + ucProp).split(' ');
if(is(prefixed, "string") || is(prefixed, "undefined")) {
return testProps(props, prefixed);
} else {
props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' ');
return testDOMProps(props, prefixed, elem);
}
}
tests['multiplebgs'] = function() {
setCss('background:url(https://),url(https://),red url(https://)');
return (/(url\s*\(.*?){3}/).test(mStyle.background);
};
tests['cssgradients'] = function() {
var str1 = 'background-image:',
str2 = 'gradient(linear,left top,right bottom,from(#9f9),to(white));',
str3 = 'linear-gradient(left top,#9f9, white);';
setCss(
(str1 + '-webkit- '.split(' ').join(str2 + str1) +
prefixes.join(str3 + str1)).slice(0, -str1.length)
);
return contains(mStyle.backgroundImage, 'gradient');
};
for ( var feature in tests ) {
if ( hasOwnProp(tests, feature) ) {
featureName = feature.toLowerCase();
Modernizr[featureName] = tests[feature]();
classes.push((Modernizr[featureName] ? '' : 'no-') + featureName);
}
}
Modernizr.addTest = function ( feature, test ) {
if ( typeof feature == 'object' ) {
for ( var key in feature ) {
if ( hasOwnProp( feature, key ) ) {
Modernizr.addTest( key, feature[ key ] );
}
}
} else {
feature = feature.toLowerCase();
if ( Modernizr[feature] !== undefined ) {
return Modernizr;
}
test = typeof test == 'function' ? test() : test;
if (typeof enableClasses !== "undefined" && enableClasses) {
docElement.className += ' ' + (test ? '' : 'no-') + feature;
}
Modernizr[feature] = test;
}
return Modernizr;
};
setCss('');
modElem = inputElem = null;
Modernizr._version = version;
Modernizr._prefixes = prefixes;
Modernizr._domPrefixes = domPrefixes;
Modernizr._cssomPrefixes = cssomPrefixes;
Modernizr.hasEvent = isEventSupported;
Modernizr.testProp = function(prop){
return testProps([prop]);
};
Modernizr.testAllProps = testPropsAll;
Modernizr.testStyles = injectElementWithStyles;
Modernizr.prefixed = function(prop, obj, elem){
if(!obj) {
return testPropsAll(prop, 'pfx');
} else {
return testPropsAll(prop, obj, elem);
}
};
return Modernizr;
})(this, this.document);
; |
CSS validar para todos los navegadores 
