图片旋转

    var rote=0;
    var i=0;
    //顺时针旋转
    $(".pop_write .turn_right").click(function(){
            var isIE = navigator.userAgent.toLowerCase().indexOf("msie") != -1;

            if(isIE){
                // for IE
                i = (i+1)%4;
                $(".pop_write .img_wp >img").css({filter:"progid:DXImageTransform.Microsoft.BasicImage(Rotation="+i+")"});

                var he = $(".pop_write .img_wp >img").height();
                var we = $(".pop_write .img_wp >img").width();

                $(".pop_write .img_wp").css({width:we+"px",height:he+"px"});
                $(".pop_write .img_del").css({left:le+"px"});
            }else{
                //for other
                rote = rote+90;
                var he = $(".pop_write .img_wp >img").height();
                var we = $(".pop_write .img_wp >img").width();
                var der = (rote/90)%4;
                var translatY = -(he-we)/2;
                var translatX = -Math.ceil((we-he)/2);
                var attr = null;
                var navgNick = navigator.userAgent.toLowerCase();

                if(navgNick.indexOf("gecko") > 0){attr = "-moz-transform"};
                if(navgNick.indexOf("presto") > 0) {attr = "-o-transform"};
                if(navgNick.indexOf("webkit") > 0) {attr = "-webkit-transform"};

                turnImg(der,attr,we,he,rote,translatY,translatX);
            }
    })

    //逆时针旋转
    $(".pop_write .turn_left").click(function(){
            var isIE = navigator.userAgent.toLowerCase().indexOf("msie") != -1;
            if(isIE){

                i = i >0?(i-1)%4:(3-i)%4;
                $(".pop_write .img_wp >img").css({filter:"progid:DXImageTransform.Microsoft.BasicImage(Rotation="+i+")"});

                var he = $(".pop_write .img_wp >img").height();
                var we = $(".pop_write .img_wp >img").width();

                $(".pop_write .img_wp").css({width:we+"px",height:he+"px"});
                $(".pop_write .img_del").css({left:le+"px"});

            }else{
                rote = rote-90;
                var he = $(".pop_write .img_wp >img").height();
                var we = $(".pop_write .img_wp >img").width();
                var attr = null;
                var navgNick = navigator.userAgent.toLowerCase();

                if(navgNick.indexOf("gecko") > 0){attr = "-moz-transform"};
                if(navgNick.indexOf("presto") > 0) {attr = "-o-transform"};
                if(navgNick.indexOf("webkit") > 0) {attr = "-webkit-transform"};
                if(!attr){return false;};

                var der = (-rote/90)%4;
                var translatY = (he-we)/2;
                var translatX = Math.ceil((we-he)/2);

                turnImg(der,attr,we,he,rote,translatY,translatX);
            }
    })

//图片旋转90度
function turnNine(attr,we,he,rote,translatY,translatX){
    $(".pop_write .img_wp").css({width:he+"px",height:we+"px"});
    $(".pop_write .img_wp >img").css(attr, "rotate("+rote+"deg)"+" "+"translate("+translatY+"px,"+(-translatX)+"px)");
}
//图片旋转180和360度
function turnLevel(attr,we,he,rote,translatY,translatX){
    $(".pop_write .img_wp").css({width:we+"px",height:he+"px"});
    $(".pop_write .img_wp >img").css(attr,"rotate("+rote+"deg)"+" "+"translate(0px,0px)");
}
//图片旋转270度
function turnSecd(attr,we,he,rote,translatY,translatX){
    $(".pop_write .img_wp").css({width:he+"px",height:we+"px"});
    $(".pop_write .img_wp >img").css(attr, "rotate("+rote+"deg)"+" "+"translate("+(-translatY)+"px,"+(translatX)+"px)");
    }else{
    $(".pop_write .img_wp >img").css(attr, "rotate("+rote+"deg)"+" "+"translate("+(-translatY)+"px,"+(0)+"px)");
}
//图片旋转
function turnImg(der,attr,we,he,rote,translatY,translatX){
    switch(der){
        case -3:
        case 1:
            turnNine(attr,we,he,rote,translatY,translatX);
            break;
        case -1:
        case 3:
            turnSecd(attr,we,he,rote,translatY,translatX)
            break;
        case -2:
        case 0:
        case 2:
            turnLevel(attr,we,he,rote,translatY,translatX);
            break;
    }
}

<!-- 写点什么弹出 [-->
<div class="pop pop_write" style="width:700px;height:700px;text-align:center">
 <div class="img_wp" style="display:inline-block;width:300px;height:300px;">
　　<a class="turn_left" style="display:inline-block;background:red;margin-right:20px;">逆时针旋转</a><a class="turn_right" style="display:inline-block;background:red;">顺时针旋转</a>
　　<img src="background.png" alt="" />
 </div>
</div>
<!--] 写点什么弹出 -->