css3 矩阵 js旋转过程运算

var j = 290,cosVal,sinVal,select_ui = $("#p1
.m1");

t = setInterval(function(){

cosVal
= Math.cos(j * Math.PI / 180);

sinVal
= Math.sin(j * Math.PI / 180);

//console.info('')

select_ui.css("-webkit-transform","matrix("+cosVal.toFixed(6)+","+(-sinVal.toFixed(6))+","+sinVal.toFixed(6)+","+cosVal.toFixed(6)+",0,65)");

if(j
>= 360){

clearInterval(t);

}else{

j+=5;

}

},100);