public function setWhere($v=''){
			if(is_array($v)){
	        		$q='';
	        		if(count($v)>0){
	        			foreach($v as $key=>$value){
			            	$q.= " {$key}= '{$value}' AND";
		        		}
		        		$q=substr($q, 0, -3);
		        	}
		        	$this->where=$q;
	        	}else{
	        		$this->where=$v;
	        	}
		}