quantity increment / decrement from category page magento

quantity increment decrement

<script type="text/javascript">
    $j(".plus_sign").click(function() {
	        var catcount = 9;
	        var cartitems = 0;
	        $j('.firstload').css("display","none");
			var id = $j(this).attr('rel');
			var text_val = $j('#qty_'+id).val();
			//var checkidval = $j('#qty_'+id).val();
			var divcounter = $j('#qty_counter'+id).text();
			var currentVal = $j('.myinput').val();
			var count = $j('.mycount').val();
			if(count == catcount) {
			$j("#upcounter").html(+count+" of "+catcount+" meals selected");
			return false;
			} else {
			$j('#qty_'+id).val(parseInt(text_val)+1);
			$j('#qty_counter'+id).html(parseInt(text_val)+1);
			$j("#upcounter").html(parseInt(count)+1+" of "+catcount+" meals selected");
			$j("#left_count").html(parseInt(count)+1);
			$j('.mycount').val(++count);
			}
        });
    $j(".minus_sign").click(function() {
	        var id = $j(this).attr('rel');
	        var check_val = $j('#qty_'+id).val();
			//alert(check_val);
			if(check_val == 0) {
			 return false;
			} else {
	        $j('.firstload').css("display","none");
            var totalcatcount = 9;    
		    var id = $j(this).attr('rel');
			var qty_val = $j('#qty_'+id).val();
			var cartitems = $j('.mycount').val();
			$j('#qty_'+id).val(parseInt(qty_val)-1);
            $j('#qty_counter'+id).html(parseInt(qty_val)-1);
			$j("#upcounter").html(parseInt(cartitems)-1+" of "+totalcatcount+" meals selected");
			$j("#left_count").html(parseInt(cartitems)-1);
			$j('.mycount').val(--cartitems);
			  }
			});
    /*function setLocationAjax(url,id){
        var qty = $j('#qty_'+id).val();
		if(qty == 0) {
		return false;
		}
        //url += '?isAjax=1&amp;qty='+qty;
        try {
            $j.ajax( {
			    type:'post',
                url : url,
				data : {qty:qty},
                success : function(data) {
				     if(data) {
					 //window.location.href = window.location.href;
		             window.location.reload(true);
					 }
                     setAjaxData(data,false);					 
                }
            });
        }
		catch (e) {
		  alert(e);
        }
    }*/
		
		$j(".chkout_btn").click(function(){
		var categorycount = 9;
		var totalclickcount = $j('.mycount').val();
		//alert(categorycount);alert(totalclickcount);
			if(categorycount==totalclickcount){
				$j(".fme_loading_filters").css("display","block");
				$j.ajax({
					  url: "http://www.xyz.com/index.php/checkout/index/cartadd/",
					  type: 'POST',
					  data: $j("#listform").serializeArray(),
					  success: function(data) {
						$j(".fme_loading_filters").css("display","none");
						//alert("All meals have been added to the cart");
						location.reload();
						
							//if(data='success')
							//window.location.href="http://www.xyz.com/index.php/checkout/cart/";
					  },
					  error: function(e) {
						
						console.log(e.message);
					  }
					});
			}else{
			alert("Please Choose "+categorycount+" meals for "+categorycount+" Meal Plan");
			}
		});
		$j(document).ready (function(){
			$j(".more").click(function() {
			    $j(".mtext-row").html($j(this).attr('rel'));
				$j('.morepop').show();
				$j('.pop-layer').fadeIn();
				$j('.morepop .inisde-pop').fadeIn();
			});
			
			$j(".morepop a.pop-close").click(function() {
				$j('.morepop').hide();
				$j('.pop-layer').fadeOut();
				$j('.morepop .inisde-pop').fadeOut();
			});
	   });
</script>