jQuery clear text

gistfile1.txt

// by Alex Karpov
    function prepare_alias(val) {
        val=val;
        if (val!="") {
            var result = val.replace(/ /g, "-");
            result = result.replace(/[^a-zA-Z0-9_-]+/g, '');
            result = result.replace(/^[-|_]*/g,'');
            result = result.replace(/[-|_]*$/g,'');
            result = result.replace(/[-]+/g,'-');
            result = result.toLowerCase();
        
            return result;
        }
    }