<HTML xmlns:v><STYLE>v/:*{behavior:url(#default#VML);}</STYLE>
<BODY bgcolor="#eeeeee">
<v:PolyLine id="aa" filled="f" Points="0,0 0,100 100,100" style="Z-INDEX:1;LEFT:571;POSITION:absolute;TOP:225"
οnmοuseup="aa();">
</v:PolyLine>
<script>
function aa(){
var polylineEle=document.getElementById( "aa");
polylineEle.points.value = "0,0 0,100 -100,100";
}
</script>
</body>
</html>