代码如下：
<script language="javascript"> var line=new Array(); var w=35; // 一条边框的小格的个数（所以是个正方形啦） var left=280; // 这个是边框在页面中的位置的左上角的X坐标 var top=10; // 自然就是纵坐啦 var width=4; // 边框中一小格的象素宽 var height=3; // 边框的高度，设为1的话就是一条细线了 line[0]="ff"+Number(25).toString(16)+Number(25).toString(16); line[1]="ff"+Number(50).toString(16)+Number(50).toString(16); line[2]="ff"+Number(75).toString(16)+Number(75).toString(16); line[3]="ff"+Number(100).toString(16)+Number(100).toString(16); line[4]="ff"+Number(125).toString(16)+Number(125).toString(16); line[5]="ff"+Number(150).toString(16)+Number(150).toString(16); line[6]="ff"+Number(175).toString(16)+Number(175).toString(16); line[7]="ff"+Number(200).toString(16)+Number(200).toString(16); line[8]="ff"+Number(225).toString(16)+Number(225).toString(16); line[9]="ff"+Number(225).toString(16)+Number(225).toString(16); line[10]="ff"+Number(225).toString(16)+Number(225).toString(16); line[11]="ff"+Number(225).toString(16)+Number(225).toString(16); line[12]="ff"+Number(200).toString(16)+Number(200).toString(16); line[13]="ff"+Number(175).toString(16)+Number(175).toString(16); line[14]="ff"+Number(150).toString(16)+Number(150).toString(16); line[15]="ff"+Number(125).toString(16)+Number(125).toString(16); line[16]="ff"+Number(100).toString(16)+Number(100).toString(16); line[17]="ff"+Number(75).toString(16)+Number(75).toString(16); line[18]="ff"+Number(50).toString(16)+Number(50).toString(16); line[19]="ff"+Number(25).toString(16)+Number(25).toString(16); function writes(num) { var temp; var s; var tl,tt; var tw,th; temp=num+1; if(num==0) { tl = left; tt = top; tw = w*width; th = height; s="<table style='position: absolute; left: "+tl+"px; top: "+tt+"px; width: "+tw+"px; height: "+th+"px;' cellspacing='0' cellpadding='0'><tr>"; for(r=0;r<w;r++) { temp=r+w*num; s+="<td id=tab"+temp+" bgcolor=red></td>"; } s+="</tr></table>"; } if(num==1) { tl = left+w*width; tt = top; tw = height; th = w*width; s="<table style='position: absolute; left: "+tl+"px; top: "+tt+"px; width: "+tw+"px; height: "+th+"px;' cellspacing='0' cellpadding='0'>"; for(r=0;r<w;r++) { temp=r+w*num; s+="<tr><td id=tab"+temp+" bgcolor=red></td></tr>"; } s+="</table>"; } if(num==2) { tl = left+height; tt = top+w*width; tw = w*width; th = height; s="<table style='position: absolute; left: "+tl+"px; top: "+tt+"px; width: "+tw+"px; height: "+th+"px;' cellspacing='0' cellpadding='0'><tr>"; for(r=w;r>0;r--) { temp=r-1+w*num; s+="<td id=tab"+temp+" bgcolor=red></td>"; } s+="</tr></table>"; } if(num==3) { tl = left; tt = top+height; tw = height; th = w*width; s="<table style='position: absolute; left: "+tl+"px; top: "+tt+"px; width: "+tw+"px; height: "+th+"px;' cellspacing='0' cellpadding='0'>"; for(r=w;r>0;r--) { temp=r-1+w*num; s+="<tr><td id=tab"+temp+" bgcolor=red></td></tr>"; } s+="</table>"; } return s; } function count() { var i; var temp; var total; total = w*4; for(i=0; i<line.length; i++) { temp=pos+i-line.length/2; temp=temp<0?(total+temp):temp; temp=temp>(total-1)?(temp-total):temp; document.all["tab"+temp].style.backgroundColor=line[line.length-i]; } pos=(pos+1)>total?0:(pos+1); } for(i=0;i<=3;i++) { document.write(writes(i)); } var pos=0; setInterval("count()", 1); </script>