屏蔽右键和选择文本

  <script type="text/javascript">
  document.body.oncontextmenu=function(){ alert (1);return false;}; 
  document.body.ondragstart=function(){alert(2);return false;}; 
  document.body.onselectstart=function(){alert(3);return false;}; 
  document.body.onbeforecopy=function(){alert(4);return false;}; 
  document.body.onselect=function(){alert(5);document.selection.empty();}; 
  document.body.oncopy=function(){alert(6);document.selection.empty();}; 
  document.body.onmouseup=function(){alert(7);document.selection.empty();}; 
  </script>

使用方式，直接放入页面js处，并去掉alert()方法。