WebGL编程指南.ZC

        window.onload = function()
        {
            var canvas = document.getElementById(‘webgl‘);

            var names = ["webgl", "experimental-webgl", "webkit-3d", "moz-webgl"];
            
            for (var ii = 0; ii < names.length; ++ii)
            {
                var context = null;
                try {
                    context = canvas.getContext(names[ii]);
                } catch(e) {}

                if (context)
                    console.log(" != null");
                else
                    console.log(" == null");
            }
        };