function switch1(div) {
/*var option=['one','two','three']; */
var option=['1','2','3','4','5','6','7','8','9','10'];
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('1');}