var win = null;
function Des(mypage, w, h, t, scroll, top_p){
scroll=(scroll==0) ? 'no': 'yes';  
LeftPosition = (screen.width-w)/2-13;
TopPosition=(typeof(top_p)!="undefined") ? top_p : (screen.height-h)/2;  
settings ='height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',noresize'
win = window.open(mypage, t, settings).focus(); 
}