function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}


// popup for banner ads and other services links
function screen_PopUp(link) {
	PopUpWindow = window.open(link, "screen_PopUp",
		"toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=750,height=600,left=100,top=100");
	PopUpWindow.focus();
}

// popup questions in side bar
function screen_PopUp1(link) {
	PopUpWindow = window.open(link, "screen_PopUp1",
		"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=450,height=385,left=100,top=100");
	PopUpWindow.focus();
}