Producing SEO friendly URL in javascript

Question

I have a PHP function that converts a URL to an SEO friendly URL:

function seo_url($input){
     $input = str_replace(array("'", "-"), "", $input); //remove single quote and dash
     $input = mb_convert_case($input, MB_CASE_LOWER, "UTF-8"); //convert to lowercase
     $input = preg_replace("#[^a-zA-Z0-9]+#", "-", $input); //replace everything non an with dashes
     $input = preg_replace("#(-){2,}#", "$1", $input); //replace multiple dashes with one
     $input = trim($input, "-"); //trim dashes from beginning and end of string if any
     return $input;
}

I know it's pointless for SEO to do this to a URL in javascript, but for the sake of consistency I want URL's to appear the same in my application. Does anyone have the function handy in javascript?