<SCRIPT LANGUAGE="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){ var status = o.value=="全选" o.value=status?"取消":"全选" checkall(status,'a'); } </SCRIPT> <INPUT TYPE="checkbox" NAME="b">1 <INPUT TYPE="checkbox" NAME="b">2 <INPUT TYPE="checkbox" NAME="a">3 <INPUT TYPE="checkbox" NAME="a">4 <INPUT TYPE="checkbox" NAME="a">5<BR> <input type="button" οnclick="setstatus(this)" value="全选">
