function sizes(url){
window.open(url, "window_name", "width=820,height=600,");
}

function akimizu(url){
window.open(url, "window_name", "width=480,height=320,");
}

function sizel(url){
window.open(url, "window_name", "width=820,height=650,");
}

function sizes480(url){
window.open(url, "window_name", "width=480,height=360,");
}

function sizel720(url){
window.open(url, "window_name", "width=720,height=520,");
}