Jquery globalcss IE opacity

Question

I am using the jquery globalcss plugin to modify global stylesheets. It does not handle opacity and IE.

I tried to make it work without luck. Here is my attempt to make the plugin try to understand the opacity of the IE style.

function changeCss (property, value, target) {
    if (property === "opacity") {
        $(target).globalcss("filter","alpha(opacity="+value*100+")");   
        /* For IE 8 (and 9, 10, 11?). Don't miss the added quotes */
        $(target).globalcss("-MS-filter","\"progid:DXImageTransform.Microsoft.Alpha(Opacity="+value*100+")\""); 

    }
    $(target).globalcss(property,value);
}

Blah. If someone can help, it will be great. Thanks.

I insert the plugin here because it is no longer on its source site:

/*
 * Global Stylesheet jQuery Plugin
 * Version: 0.1
 * 
 * Enables CSS modification that uses a 'global' stylesheet, rather than inline CSS.
 *
 * Copyright (c) 2009 Jeremy Shipman (http://www.burnbright.co.nz)
 * 
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 * 
 * INSTRUCTIONS:
 * use in the same way as the jQuery css function. Eg:
 *  $("some selector").globalcss("style","value");
 *
 * use the globalsetylesheet.print() function to return a string of the global stylesheet
 */
(function($) {

    //global singleton class for 
    globalstylesheet = new function globalStylesheet(){
        if(!document.styleSheets){
            alert("document.Stylesheets not found");
            return false;
        }

        var sheet = null;
        var setrules = Array(); // rule cache

        //set up a dummy noded
        var cssNode = document.createElement('style');
        cssNode.type = 'text/css';
        cssNode.rel = 'stylesheet';
        cssNode.media = 'screen';
        cssNode.title = 'globalStyleSheet';
        document.getElementsByTagName("head")[0].appendChild(cssNode);

        //find the newly created stylesheet and store reference
        for(var i = 0; i < document.styleSheets.length; i++){
            if(document.styleSheets[i].title == "globalStyleSheet"){
                sheet = document.styleSheets[i];
            }
        }

        //set a CSS rule
        this.setRule = function setRule(selector,ruleText){
            if(setrules[selector] != undefined){
                return setrules[selector];
            }else{
                if(sheet.addRule){ // IE
                    sheet.addRule(selector,ruleText,0);
                }else{
                    sheet.insertRule(selector+'{'+ruleText+'}',0);
                }
                setrules[selector] = this.getRule(selector);
            }
            return setrules[selector];
        }

        //get a saved CSS rule
        this.getRule = function getRule(selector){
            if(setrules[selector] != undefined){
                return setrules[selector];
            }else{
                var rules = allRules();
                for(var i = 0; i < rules.length; i++){
                    if(rules[i].selectorText == selector){
                        return rules[i];
                    }
                }
            }
            return false;
        }

        //helper function to get all rules
        function allRules(){
            if(sheet.cssRules){ //IE
                return sheet.cssRules;
            }else{
                return sheet.rules;
            }
        }

        //print out the stylesheet
        this.print = function print(){
            var styleinfo = "";
            var rules = allRules();
            for(var i = 0; i < rules.length; i++){
                styleinfo+= rules[i].cssText+"\n"
            }
            return styleinfo;
        }

        //use jQuery css selector function to set the style object
        this.css = function css(jquery,key,value){
            rule = this.setRule(jquery.selector,key+":"+value+";");
            jQuery(rule).css(key,value); 
        }
    }

    //hook new function into jQuery
    jQuery.fn.extend({
        globalcss : function globalcss(key,value){
            globalstylesheet.css(this,key,value);
        }
    });

})(jQuery);

Edit: I created a demo version of jsbin live. Compare in different browsers. http://jsbin.com/iqadu/edit

Answer 1

UPDATE:

. , : 1. , , javascript ? , ".5" .

    // works
    var property = "opacity";
    var value = "0.5";
    var target = ".transparency";

    // doesn't work
    var property = "opacity";
    var value = ".5";
    var target = ".transparency";

: http://jsbin.com/ikore3. , javascript . .

-

IE, jquery: , , " layout", IE , CSS, , , .. "", .

CSS , "". , , , , CSS, , , .

http://joseph.randomnetworks.com/archives/2006/08/16/css-opacity-in-internet-explorer-ie/:

/ IE . IE , / . , "zoom: 1" CSS. , , , , .

JavaScript , IE element.currentStyle.hasLayout. hasLayout , CSS.

, , :

◦ OpacityStep-by-Step [ ]

◦

◦ Opacity @QuirksMode

, , :

function changeCss (property, value, target) {
    if (property === "opacity") {
        $(target).globalcss("filter","alpha(opacity="+value*100+")");   
        /* For IE 8 (and 9, 10, 11?). Don't miss the added quotes */
        $(target).globalcss("-MS-filter","\"progid:DXImageTransform.Microsoft.Alpha(Opacity="+value*100+")\""); 

        $(target).globalcss("zoom","1");   // ensure the target has layout
    }
    $(target).globalcss(property,value);
}

, , , . hasLayout , , , , IE, hasLayout .

, URL- HTML, , ? !