function addhandler(f)
{
        for (var i=0; i<f.elements.length; i++) {
            if (f.elements[i].type == "text")
                f.elements[i].onfocus = new Function("this.select()");
        }
}

function Changepass()
{
        window.open("changepass.php","Change_Passwords","width=255, height=190, status=no, resizable=yes, top=200, left=200, dependent=yes, alwaysRaised=yes");
}

function IsValid(str, validChars)
{
        var ret = true;
                                                                                
        if (str.length == 0) return false;
        for (i=0; i < str.length && ret == true; i++) {
                if (validChars.indexOf(str.charAt(i)) == -1) {
                        ret = false;
                }
        }
                                                                                
        return ret;
}