ucfirst and ucwords in javascript

Use this following functions for Ucfirst and Ucwords in javascript.
This defined javascript function will work as PHP built in function works

<script type='text/javascript'>
    function javascript_ucfirst(text)
    {
        text=text.trim()
        if (text=='')
        return '';
        text1=text[0];
        text=text.substr(1,text.length)
        text=text1.toUpperCase()+text
        return text
    }
    function javascript_ucwords(text)
    {
        text_arr=text.split(" ")
        var output=''
        for(s=0;s<text_arr.length;s++)
        output+=javascript_ucfirst(text_arr[s])+" "
        return output;
    }
    test_ucwords=javascript_ucwords("mani muthu pandi")
    test_ucfirst=javascript_ucfirst("mani muthu pandi")
    document.write("Ucfirst==="+test_ucfirst)
    document.write("<br />Ucwords==="+test_ucwords)
</script>