var win=null;
function popUp(mypage,myname,w,h,scroll,pos){
    if(pos=="random") {
	LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
    }
    if(pos=="center") {
	LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;
    }
    else if((pos!="center" && pos!="random") || pos==null) {
	LeftPosition=0;TopPosition=20
    }
    settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
    win=window.open(mypage,myname,settings);
    if(win.focus) {
	win.focus();
    }
}