function pop(url) {
  link = window.open(url,"pop","toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=400,height=400,left=25,top=25");
}
function popa(url) {
  link = window.open(url,"popa","toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=620,height=900,left=100,top=50");
}
function popb(url) {
  link = window.open(url,"popb","toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=700,height=400,left=100,top=100");
}
function popc(url) {
  link = window.open(url,"popc","toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=560,height=620,left=25,top=25");
}
function popd(url) {
    link = window.open(url, "popd", "toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=640,height=600,left=100,top=50");
}