// JavaScript Document
function chanagesize(v){
  url=window.location+"";
  if(url.indexOf("?")!=-1){
	if(url.indexOf("ps=")!=-1){
        reg=/ps=([0-4]){0,}/
        url=url.replace(reg,"ps="+v);
	    window.location.href=url;
	}else{
		window.location.href=window.location+"&ps="+v;
	}
  }else{
    window.location.href=window.location+"?ps="+v;
  }
}