Tutorial Check if font-family is Honored

function checkFont(strFamily) {
var objDiv = document.createElement('div');

objDiv.style.fontFamily = strFamily;
objDiv.appendChild(document.createTextNode('FONT TEST'));

if (window.getComputedStyle) {
return window.getComputedStyle(objDiv, null).getPropertyValue('font-family') === strFamily;
}

return objDiv.currentStyle.fontFamily === strFamily;
}
Usage
var