JS实现HTML复选框的全选

wmcoo

function selectAll(){var selectall=document.getElementById("selectall");var checkboxid=document.getElementsByName("checkboxid");if(selectall.checked==true){for(var i=0;i<checkboxid.length;i++){checkboxid[i].checked=true;}}else{for(var i=0;i<checkboxid.length;i++){checkboxid[i].checked=false;}}}