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JavaScript中有四种不同类型的循环，for循环、do-while循环和while循环。（第四种类型为for-in循环，用于迭代对象的属性，本文不予讨论。）代码如下：
var values = [1, 2, 3, 4, 5];
//for 循环
for(var i=0; i<values.length; i++){
process(values[i]);
}
//do-while 循环
var j=0;
do{
process(values[j++] ......
1. oncontextmenu="window.event.returnValue=false" 将彻底屏蔽鼠标右键
<table border oncontextmenu=return(false)><td>no</table> 可用于Table
2. <body onselectstart="return false"> 取消选取、防止复制
3. onpaste="return false" 不准粘贴
4. oncopy="return false;" oncut="return f ......
