javascript right trim word code example

Example 1: javascript trim

var str=" I have outer spaces ";
var cleanStr=str.trim();//trim() returns string with outer spaces removed

Example 2: javascript right trim

function rtrim(str, ch)
{
    for (i = str.length - 1; i >= 0; i--)
    {
        if (ch != str.charAt(i))
        {
            str = str.substring(0, i + 1);
            break;
        }
    } 
    return str;
}