//复选框全选
var cause = document.getElementsByName("fmCause");
for ( var i = 0; i < cause.length; i++) {
if(!cause[i].checked) {
cause[i].checked =true;
}
}
//复选框取消全选
var cause = document.getElementsByName("fmCause");for ( var i = 0; i < cause.length; i++) {
if(cause[i].checked) {
cause[i].checked = false;
}
}