function switch1(div) {
var option=['one','two','three', 'three', 'four','five','six','seven','eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen', 'fourteen','1a','1b','1c','1d','1e','2a','2b','2c','2d','2e','2f','3a','4a','4b','4c','4d','4e','4f','4g','4h','4i','4j','4k','4l','5a','5b','5c','5d','5e','5f','5g','5h','5i','5j','5k','6a','6b','6c','6d','6e','6f','6g','6h','6i'];
for(var i=0; i<option.length; i++) {
if (document.getElementById(option[i])) {
obj=document.getElementById(option[i]);
obj.style.display=(option[i]==div)? "block" : "none";
}
}
}

window.onload=function () {switch1('one');}