function swap(id,mode){
  var img = document.getElementById(id);
  if(mode==1) img.src=img.src.substr(0,img.src.length-4)+'_o.'+img.src.substr(img.src.length-3,img.src.length);
  if(mode==0) img.src=img.src.substr(0,img.src.length-6)+'.'+img.src.substr(img.src.length-3,img.src.length);  
}

function open_popup(src, width, height, target, scrollbars){
	var win=window.open(src,target,'screenX='+Math.floor((screen.availWidth-width)/2)+', screenY='+Math.floor((screen.availHeight-height)/2)+', left='+Math.floor((screen.availWidth-width)/2)+', top='+Math.floor((screen.availHeight-height)/2)+', height='+height+',width='+width+', resizable=yes, scrollbars='+(typeof scrollbars !="underfined"?scrollbars:"yes"));
	win.focus();
	return false;
}