有的时候我们在做开发的时候会想要画出有斜线的表格，方法如下：
<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>表格斜线</title></head><script Language="javascript">function a(x, y, color) { //起始位置x，y；宽、高度都是1个像素；颜色是color画线。document.write("<img border='0' style='position: absolute; left: "+ (x + 18) + "; top: " + (y + 18) + ";background-color: "+ color + "' src='px.gif' width=1 height=1>");}</script><body leftmargin=18 topmargin=18><table border=0 bgcolor="000000" cellspacing="1" width=398><tr bgcolor="FFFFFF"><td id="td1"></td><td>张三</td><td>李四</td></tr><tr bgcolor="FFFFFF"><td>c</td><td>72</td><td>36</td></tr><tr bgcolor="FFFFFF"><td>c++</td><td>85</td><td>58</td></tr></table><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; //y=ax+b：标准的直线表达式，通过斜率求y值a(x, y, color);}}line(td1.offsetLeft, td1.offsetTop, td1.offsetLeft + td1.offsetWidth, td1.offsetTop + td1.offsetHeight, '#000000');</script></body>
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