经典 全选 取消JavaScript

function $N(name){return document.getElementsByName(name);} function $TN(name){return document.getElementsByTagName(name);} function checkall(v,name){//v当前要设置的值true/false;name要设置的checkbox组的name,如果省略则默认为所有的checkbox o=name?$N(name):$TN("input"); for(i=0;i<o.length;i++) if(o[i].type=="checkbox")o[i].checked=v; } function setstatus(o,names){ var status = o.value=="全选" o.value=status?"取消":"全选" checkall(status,names); }