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function clearTable() {
var tbody = document.getElementById("tbody");
var trchilds = tbody.childNodes;
for (var i = trchilds.length-1; i > 0; i--) {
var tdchilds = trchilds[i].childNodes;
for (var j = tdchilds.length-1; j > 0; j--) {
tdchilds[j].replaceChild(document.createTextNode(" ")); // 问题行 提示参数是必选项怎么回事
}
}
}
function clearTable() {
var tbody = document.getElementById("tbody");
var trchilds = tbody.childNodes;
var strobj = document.createTextNode(" ");
for (var i = trchilds.length-1; i >= 0; i--) {
var tdchilds = trchilds[i].childNodes;
for (var j = tdchilds.length-1; j >= 0; j--) {
var textnodes = tdchilds[j].childNodes;
tdchilds[j].replaceChild(textnodes, strobj);
}
}
}