JavaScript 图书翻页效果(2)

    function mouseUpHandler( event ) { 
        for( var i = 0; i < flips.length; i++ ) { 
            // If this flip was being dragged, animate to its destination  
            if( flips[i].dragging ) { 
                // Figure out which page we should navigate to  
                if( mouse.x < 0 ) { 
                    flips[i].target = -1; 
                    if(direction == "right") { 
                        page = Math.min( page + 1, flips.length ); 
                    } 
                } 
                if(mouse.x > 0){ 
                    flips[i].target = 1; 
                    if(direction == "left") { 
                        page = Math.max( page - 1, 0 ); 
                    } 
                } 
            } 
            //console.log("page:" + page + ";  flips[" + i + "].target:" + flips[i].target + ";  flips[" + i + "].dragging:" + flips[i].dragging);  
            flips[i].dragging = false; 
        } 
        //console.log(" ");  
    } 

摘自 简生的代码备忘录