function disp(url){
	window.open(url, "window_name", "width=720,height=600, scrollbars=yes, resizable=yes"); 
}
function disp1(url){
	window.open(url, "window_name", "width=920,height=600, scrollbars=yes, resizable=yes"); 
}
function disp2(url){
	window.open(url, "window_name", "width=840,height=600, scrollbars=yes, resizable=yes"); 
}