(function($) {
var element;

$.fontAvailable = function(fontName) {
var width, height;

// prepare element, and append to DOM
if(!element) {
element = $( document.createElement( ‘span’ ))
.css( ‘visibility’, ‘hidden’ )
.css( ‘position’, ‘absolute’ )
.css( ‘top’, ‘-10000px’ )
.css( ‘left’, ‘-10000px’ )
.html( ‘abcdefghijklmnopqrstuvwxyz’ )
.appendTo( document.body );
}

// get the width/height of element after applying a fake font
width = element
.css(‘font-family’, ‘__FAKEFONT__’)
.width();
height = element.height();

// set test font
element.css(‘font-family’, fontName);

return width !== element.width() || height !== element.height();
}
})(jQuery);