function disp_a(url) {
	window.open(url, "a", "width=670,height=700,left=30,top=30,location=1,resizable=1,scrollbars=1,menubar=1,directories=1,status=1,toolbar=1");
}
function disp_b(url) {
	window.open(url, "b", "width=440,height=560,left=30,top=30,location=1,resizable=1,scrollbars=1,menubar=1,directories=1,status=1,toolbar=1");
}
function disp_c(url) {
	window.open(url, "c", "width=900,height=700,left=30,top=30,location=1,resizable=1,scrollbars=1,menubar=1,directories=1,status=1,toolbar=1");
}
function disp_d(url) {
	window.open(url, "d", "width=560,height=330,left=30,top=30,location=1,resizable=1,scrollbars=1,menubar=1,directories=1,status=1,toolbar=1");
}