function cases(page) { 
window.open(page,"_blank","width=490, height=700, scrollbars=1, toolbar=0, resizable=1"); 
//window.focus(); 
return; 
} 
function ditu(page) { 
window.open(page,"_blank","width=760, height=600, scrollbars=1, toolbar=0, resizable=1"); 
//window.focus(); 
return; 
}