void setup() {
  size(300,300);
}

void loop() {

  rect(120,120, 60,60);
}

void mousePressed() {
  // this only works when running as applet

// this works in firefox but not IE  
/*  if(mouseX>=120 && mouseX<180 &&
    mouseY>=120 && mouseY<180) link("javascript:function winopen(url)"+
      " {window.open(url,'blah','width=400,height=400,"+
      "toolbar=false,status=false ');}; winopen('http://www.db.no/');");
*/

  if(mouseX>=120 && mouseX<180 &&
    mouseY>=120 && mouseY<180) link("http://www.db.no/");
}