JavaScript toSlug()

js-toSlug.js

String.prototype.toSlug = function(){
    st = this.toLowerCase();
    st = st.replace(/[\u00C0-\u00C5]/ig,'a')
    st = st.replace(/[\u00C8-\u00CB]/ig,'e')
    st = st.replace(/[\u00CC-\u00CF]/ig,'i')
    st = st.replace(/[\u00D2-\u00D6]/ig,'o')
    st = st.replace(/[\u00D9-\u00DC]/ig,'u')
    st = st.replace(/[\u00D1]/ig,'n')
    st = st.replace(/[^a-z0-9 ]+/gi,'')
    st = st.trim().replace(/ /g,'-');
    st = st.replace(/[\-]{2}/g,'');
    return (st.replace(/[^a-z\- ]*/gi,''));
}