var over=false,down=false,divleft,divtop,n;
function clase(x){document.all['plane'+x].style.visibility='hidden'}
function down1(m){
n=m;down=true;divleft=event.clientX-parseInt(m.style.left);divtop=event.clientY-parseInt(m.style.top)}
function move(){if(down){n.style.left=event.clientX-divleft;n.style.top=event.clientY-divtop;}}