function change(url1,url2,url33) {

    if (url2 == 'http://www.oklahomatickets.com/') {
	parent.location.href   = url2;
    } else if (null == url33 || typeof url33 == 'undefined') {
	url3="http://www.oklahomasportstours.com/return.htm";
	parent.frames['return'].location.href = url3;
	parent.frames['left'].location.href   = url1;
	parent.frames['main'].location.href   = url2;
    } else {
        parent.frames['return'].document.write('');
        parent.frames['left'].document.write('');
        parent.frames['main'].location.href = "front.htm";
    }

}