function popoff (url, name, width, height) {
    window.name = 'PUMain';
    tearWin=window.open(url, name, 'personalbar=no,toolbar=no,status=no,scrollbars=yes,location=no,resizable=yes,menubar=no,width=' + width + ',height=' + height);
	   if(window.focus) {
    	tearWin.focus();
    }
}

function changeclass(ID, clsn) {
	 	document.getElementById(ID).className = clsn;
	}