function n_win(url,windowname,width,height,scr){
var features="menubar=no,toolbar=no,location=no,stasus=no,resizable=no";
if(scr){
if(scr = 1 )
features+=",scrollbars=yes";
else
features+=",scrollbars=no";
}
if(width){
if(window.screen.width > width)
features+=",left="+(window.screen.width-width)/2;
else width=window.screen.width;
features+=",width="+width;
}
if(height){
if(window.screen.height > height)
features+=",top="+(window.screen.height-height)/2;
else height=window.screen.height;
features+=",height="+height;
}
window,open(url,windowname,features);
}