JQ 点赞

HTML部分

<div class="praise">
<span id="praise"><img src="img/like.png" id="praise-img" /></span>
<span id="praise-txt">1455</span>
<span id="add-num"><em>+1</em></span>
</div>

CSS部分：

/*动态点赞开始*/
.praise{
40px;
height:40px;
margin: 50px auto;
cursor: pointer;
font-size: 12px;
text-align:center;
position: relative;
}
#praise{
display:block;
40px;
height:40px;
margin:0 auto;
}
#praise-txt{
height:25px;
line-height:25px;
display: block;
}
.praise img{
40px;
height:40px;
display:block;
margin: 0 auto;
}
.praise img.animation{
animation: myfirst 0.5s;
-moz-animation: myfirst 0.5s; /* Firefox */
-webkit-animation: myfirst 0.5s; /* Safari 和 Chrome */
-o-animation: myfirst 0.5s; /* Opera */
}
#add-num{
display:none;
}
#add-num .add-animation{
color: #000;
position:absolute;
top:-15px;
left: 10px;
font-size: 15px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
animation: mypraise 0.5s ;
-moz-animation: mypraise 0.5s ; /* Firefox */
-webkit-animation: mypraise 0.5s ; /* Safari 和 Chrome */
-o-animation: mypraise 0.5s ; /* Opera */
font-style:normal;
}
.praise .hover , #add-num .add-animation.hover , #praise-txt.hover{
color: #EB4F38;
}

/*点赞图标放大动画开始*/
@keyframes myfirst
{
0%{
40px;
height:40px;
}
50%{
50px;
height:50px;
}
100% {
40px;
height:40px;
}
}

@-moz-keyframes myfirst /* Firefox */
{
0%{
40px;
height:40px;
}
50%{
50px;
height:50px;
}
100% {
40px;
height:40px;
}
}

@-webkit-keyframes myfirst /* Safari 和 Chrome */
{
0%{
40px;
height:40px;
}
50%{
50px;
height:50px;
}
100% {
40px;
height:40px;
}
}

@-o-keyframes myfirst /* Opera */
{
0%{
40px;
height:40px;
}
50%{
50px;
height:50px;
}
100% {
40px;
height:40px;
}
}
/*点赞图标放大动画结束*/
/*点赞数量加减动画开始*/
@keyframes mypraise
{
0%{
top:-15px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
25%{
top:-20px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
50%{
top:-25px;
opacity: 1;
filter: Alpha(opacity=100);
-moz-opacity:1;
}
75%{
top:-30px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
100% {
top:-35px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
}

@-moz-keyframes mypraise /* Firefox */
{
0%{
top:-15px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
25%{
top:-20px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
50%{
top:-25px;
opacity: 1;
filter: Alpha(opacity=100);
-moz-opacity:1;
}
75%{
top:-30px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
100% {
top:-35px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
}

@-webkit-keyframes mypraise /* Safari 和 Chrome */
{
0%{
top:-15px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
25%{
top:-20px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
50%{
top:-25px;
opacity: 1;
filter: Alpha(opacity=100);
-moz-opacity:1;
}
75%{
top:-30px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
100% {
top:-35px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
}

@-o-keyframes mypraise /* Opera */
{
0%{
top:-15px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
25%{
top:-20px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
50%{
top:-25px;
opacity: 1;
filter: Alpha(opacity=100);
-moz-opacity:1;
}
75%{
top:-30px;
opacity: 0.5;
filter: Alpha(opacity=50);
-moz-opacity:0.5;
}
100% {
top:-35px;
opacity: 0;
filter: Alpha(opacity=0);
-moz-opacity:0;
}
}
/*点赞数量加减动画结束*/
/*动态点赞结束*/

JS 部分：

$("#praise").click(function(){
var praise_img = $("#praise-img");
var text_box = $("#add-num");
var praise_txt = $("#praise-txt");
var num=parseInt(praise_txt.text());
if(praise_img.attr("src") == ("img/likeHong.png")){
$(this).html("<img src='img/like.png' id='praise-img' class='animation' />");
praise_txt.removeClass("hover");
text_box.show().html("<em class='add-animation'>-1</em>");
$(".add-animation").removeClass("hover");
num -=1;
praise_txt.text(num)
}else{
$(this).html("<img src='img/likeHong.png' id='praise-img' class='animation' />");
praise_txt.addClass("hover");
text_box.show().html("<em class='add-animation'>+1</em>");
$(".add-animation").addClass("hover");
num +=1;
praise_txt.text(num)
}
});

效果图：