程序代码javascript:r=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; di=document.images; dil=di.length; function a(){for(i=0; i-dil; i++){dis=di[ i ].style; dis.position='absolute'; dis.left=math.sin(r*x1+i*x2+x3)*x4+x5; dis.top=math.cos(r*y1+i*y2+y3)*y4+y5}r++}setinterval('a()',5); void(0);