function zoom(whichElement) {	
if (whichElement.search('_in') > -1){
change(whichElement,'setCSS','display','inline');
change(whichElement.replace('_in', '_out'),'setCSS','display','none');
}
else if (whichElement.search('_out') > -1){
change(whichElement,'setCSS','display','inline');
change(whichElement.replace('_out', '_in'),'setCSS','display','none');
}
}