function disp021(){ 
window.open("zm02ks50.html", "zoom", "width=650,height=650,scrollbars=yes,resizable=yes"); 
} 

function disp022(){ 
window.open("zm02ks30.html", "zoom", "width=650,height=650,scrollbars=yes,resizable=yes"); 
} 

function disp023(){ 
window.open("zm02ks20.html", "zoom", "width=650,height=650,scrollbars=yes,resizable=yes"); 
}