function getPageNext(total,per_page){
	var current_href=self.location+"";
	var last_page=Math.ceil(total/per_page)-1;
	if(current_href.indexOf("p=")!=-1){
		var current_page=Number(current_href.slice(current_href.indexOf("p=")+2));
		current_href=current_href.slice(0,current_href.indexOf("p=")+2);
		if((current_page+1)<=last_page){
			self.location=current_href+(current_page+1);
		}
	}
	else{
		self.location=current_href+"?p=1";
	}
}
function getPagePrev(total,per_page){
	var current_href=self.location+"";
	var last_page=Math.ceil(total/per_page)-1;
	if(current_href.indexOf("p=")!=-1){			
		var current_page=Number(current_href.slice(current_href.indexOf("p=")+2));
		current_href=current_href.slice(0,current_href.indexOf("p=")+2);
		if((current_page-1)>=0){
			self.location=current_href+(current_page-1);
		}		
	}	
}