function scientificfeed(url,size,color,cat) {
cat = cat || 0;
if ( size == '1' ) {
document.write('');
document.write('');
document.write('
');
} else if ( size == '2' ) {
document.write('');
document.write('');
document.write('
');
} else if ( size == '3' ) {
document.write('');
document.write('');
document.write('
');
} else if ( size == '4' ) {
document.write('');
document.write('');
document.write('
');
}
}