Question

document.body.all是什么意思，结合下面那个小函数谈一谈，谢谢

function doCal(obj) {
var num = obj.value;
var tbl = document.getElementById("id_tbl");

if (document.body.all)
{
tbl.innerText = "";
}
else
{
tbl.innerHTML = "";
}

if (isNaN(num) || num.trim() == "")
{
return;
}

for (var i = 1; i <= num; i++)
{
var newRow = tbl.insertRow(tbl.rows.length);
for (var j = 1; j <= i; j++)
{
var newCell = document.createElement("td");
newCell.innerHTML = i + "*" + j + " = " + i * j;
newRow.appendChild(newCell);
}

for (j; j <= num; j++)
{
var newCell = document.createElement("td");
newCell.innerHTML = " ";
newRow.appendChild(newCell);
}
}
}

String.prototype.trim = function() {
return this.replace(/(^\s*)|(\s*$)/g, "");
};

tbl.innerText = ""
tbl.innerHTML = "";

这两句是什么意思啊

Answer 1

innerHTML:从对象的起始位置到终止位置的全部内容,包括Html标签
innerText:从起始位置到终止位置的内容, 但它去除Html标签