function goto_page(page_number){
	
	parts = location.search.toQueryParams();
	
	parts.wqPage = page_number;
	
	string = '';
	
	for(i in parts){

		if(parts[i] != undefined)
			string += i+'='+parts[i]+'&';
		else
			string += i+'&';

	}
	
	//remove last &
	string = string.slice(0,-1);

	location.href = location.protocol +'//'+ location.host + location.pathname +'?'+ string + location.hash;

}