(function () {
    for(stylesheets in document.styleSheets) {
        for(cssrules in stylesheets.cssRules) {

            if ("styleSheet" in cssrules) {
                cssrules = cssrules.styleSheet.cssRules;
            }
            for(rule in cssrules) {

                if(rule.style.fontFamily.length > 0 ) {

                    var iOf = rule.style.fontFamily.indexOf;
                    if(iOf('arial') != -1 && iOf('arial') > iOf('verdana')) {
                        rule.style.fontFamily = 'corbel';
                        rule.style.fontSizeAdjust = .519; 
                    } else if(iOf('verdana') != -1) {
                        rule.style.fontFamily = 'corbel';
                        rule.style.fontSizeAdjust = .58; 
                    } else if(iOf('courier new') != -1) {
                        rule.style.fontFamily = 'consolas';
                    }
                }
            }
        }
    }
})();