如需引入外部Js需刷新才能执行]<script>
function line(x1,y1,x2,y2,color)
{
var tmp
if(x1>=x2)
{
tmp=x1;
x1=x2;
x2=tmp;
tmp=y1;
y1=y2;
y2=tmp;
}
for(var i=x1;i<=x2;i++)
{
x = i;
y = (y2 - y1) / (x2 - x1) * (x - x1) + y1;
a(x,y,color);
}
}
//line(1,1,100,100,"000000");
line(td1.offsetLeft,td1.offsetTop,td1.offsetLeft+td1.offsetWidth,td1.offsetTop+td1.offsetHeight,'#000000')
</script>
