jQuery bind unbind animation

问题

I made this piece of code,i'm trying to animate a block of text/div back and forward, but why this works only the first time for the "placeRight" function? Is there something wrong with the right : "+=750" attribute?

$(document).ready( function ( ) {
   $("#text").click(placeRight);
});   

    var placeRight = function() {     
      $("#text").animate( { right :  "+=750" }, 1300); 
      $("#text").unbind("click"); 
      $("#text").click(placeLeft);
    }

    var placeLeft = function() {     
      $("#text").animate( { left :  "+=750" }, 1300); 
      $("#text").unbind("click");
      $("#text").click(placeRight);
    }

回答1:

Yeah, you have double time $("#text").animate( { left : "+=750" }, 1300);
so you're trying to place it always to +750px position

change it like this

$(document).ready( function ( ) {
   $("#text").click(placeRight);
});   

var placeRight = function() {     
  $("#text").animate( { right :  "+=750" }, 1300);
  $("#text").unbind("click"); 
  $("#text").click(placeLeft);
}

var placeLeft = function() {     
  $("#text").animate( { left :  "-=750" }, 1300); //or { right: 0 }
  $("#text").unbind("click");
  $("#text").click(placeRight);
}

回答2:

You could do it with less code. Here's a working demo: http://jsfiddle.net/kkZtD/1/

回答3:

try this:

$(document).ready(function(){
   $("#text").click(function(){
      $(this).animate({ right: "+=750" }, 1300).animate({ left: "0" }, 1300);
   });
});

来源：https://stackoverflow.com/questions/7378405/jquery-bind-unbind-animation