<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
</head>
<body>
</body>
</html>
<script>
// 打印一个空心菱形图案
for(var i = 1; i <=6 ; i++){
for(var k = 1 ; k<=6-i; k++){
document.write("-");
}
for(var j = 1 ; j<=i*2-1; j++){
if(i == 1){
document.write("*");
}else if(j == 1 || j == i*2-1){
document.write("*");
}else{
document.write("-");
}
}
document.write("<br>");
}
for(var i = 5; i >=1 ; i--){
for(var k = 1 ; k<=6-i; k++){
document.write("-");
}
for(var j = 1 ; j<=i*2-1; j++){
if(i == 1){
document.write("*");
}else if(j == 1 || j == i*2-1){
document.write("*");
}else{
document.write("-");
}
}
document.write("<br>");
}
</script>