Add CSS 3D Transform Test for Modernizr

Update: I wrote a better and more general solution for all css value support tests.You can read about it here..

Recently I found out that IE10 support CSS transform-style BUT it doesn't recognize preserve-3d value .
So i decided to check this with Modernizr, but i realized that modernizr doesn't have such test and doesnt support css properties value test.
So my solution was to add such test :

 tests['preserve3d'] = function () {
    var element = document.createElement('link'),
    body = document.getElementsByTagName('HEAD')[0],
    propertys = {
         'webkitTransformStyle':'-webkit-transform-style',
          'MozTransformStyle':'-moz-transform-style',
           'msTransformStyle':'-ms-transform-style',
           'transformStyle':'transform-style'
     };

     body.insertBefore(element, null);
     for (var i in propertys) {
        if (element.style[i] !== undefined) {
             element.style[i] = "preserve-3d";
         }
     }
     //ie7,ie8 doesnt support getComputedStyle
     //so this is the implementation
    if(!window.getComputedStyle) {
       window.getComputedStyle = function(el, pseudo) {
       this.el = el;
       this.getPropertyValue = function(prop) {
         var re = /(\-([a-z]){1})/g;
         if (prop == 'float') prop = 'styleFloat';
            if (re.test(prop)) {
              prop = prop.replace(re, function () {
              return arguments[2].toUpperCase();
            });
         }
         return el.currentStyle[prop] ? el.currentStyle[prop] : null;
        };
       return this;
       };
    }

    var st = window.getComputedStyle(element, null),
     transform = st.getPropertyValue("-webkit-transform-style") ||
        st.getPropertyValue("-moz-transform-style") ||
        st.getPropertyValue("-ms-transform-style") ||
        st.getPropertyValue("transform-style");

    if(transform!=='preserve-3d'){   
       element.parentNode.removeChild(element);
       return false;
    } 
    element.parentNode.removeChild(element);
     return true;
};