js实现div的切换特效上一个下一个_javascript技巧

//下一个div
function next() {
var arr = document.getElementById('tdBjzbsx').getElementsByTagName('div');
for (i = 0; i if ((arr[i].style.display == "block"||arr[i].style.display == "") && i arr[i + 1].style.display = "block";
arr[i].style.display = "none";
}
}
}
//上一个div
function top() {
var arr = document.getElementById('tdBjzbsx').getElementsByTagName('div');
for (i = 0; i if ((arr[i].style.display == "block"||arr[i].style.display == "") && i arr[i - 1].style.display = "block";
arr[i].style.display = "none";
break;
}
}
}

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