CSS style prefix.

prefixStyle.js

var prefixStyle = function(style) {

    var i, len, vendor, vendors, blank, camel;

    vendors = ['', 'webkit', 'ms', 'Moz', 'O'];
    
    blank = document.createElement('div').style;
    camel = style.charAt(0).toUpperCase() + style.slice(1);
    
    for (i = 0, len = vendors.length; i < len; i += 1) {
        vendor = vendors[i] + camel;
        
        if (vendor in blank) {
            return vendor;
        }
    }

    return style;
};