function openwindow(url, width, height) { 
var win; 
var windowName; 
var params; 
windowName = "features"; 
params = "toolbar=0,"; 
params += "location=0,"; 
params += "directories=0,"; 
params += "status=0,"; 
params += "menubar=0,"; 
params += "scrollbars=1,"; 
params += "resizable=1,"; 
params += "top=50,"; 
params += "left=100,"; 
params += "width="+width+","; 
params += "height="+height; 
win = window.open(url, windowName, params); 
}