Image_no=1;
kawa=Array(4);
kawa[1]=new Image();kawa[1].src="bl_6/bl_63.jpg";
kawa[2]=new Image();kawa[2].src="bl_6/bl_62.jpg";
kawa[3]=new Image();kawa[3].src="bl_6/bl_64.jpg";
kawa[4]=new Image();kawa[4].src="bl_6/bl_61.jpg";


function change_ima(){
        document.ima.src=kawa[Image_no].src;
        setTimeout('change_ima()',200);
        Image_no=Image_no + 1;
        if(Image_no > 4){
        Image_no= 1;
        }
}