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我需要一些帮助来获取附加单元格值的总和,这是我的代码:
var i = 0;
var ii = 0;
var iii = 0;
var iiii = 0;
function buttonClick1() {
i++;
document.getElementById("qty1").value = i;
}
function decreClick1(){
if(i <= 0)
return;
i--;
document.getElementById("qty1").value = i;
}
function buttonClick2() {
ii++;
document.getElementById("qty2").value = ii;
}
function decreClick2(){
if(ii <= 0)
return;
ii--;
document.getElementById("qty2").value = ii;
}
function buttonClick3() {
iii++;
document.getElementById("qty3").value = iii;
}
function decreClick3(){
if(iii <= 0)
return;
iii--;
document.getElementById("qty3").value = iii;
}
function buttonClick4() {
iiii++;
document.getElementById("qty4").value = iiii;
}
function decreClick4(){
if(iiii <= 0)
return;
iiii--;
document.getElementById("qty4").value = iiii;
}
var price1 = 14;
var price2 = 24;
var price3 = 34;
var price4 = 44;
var item1 = "apple";
var item2 = "boy";
var item3 = "cat";
var item4 = "dog";
function a(){
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId1'
cel1.innerHTML = item1;
cel2.innerHTML = document.getElementById("qty1").value;
cel3.innerHTML = "PHP"+price1*i;
}
function b(){
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId2'
cel1.innerHTML = item2;
cel2.innerHTML = document.getElementById("qty2").value;
cel3.innerHTML = "PHP"+price2*ii;
}
function c(){
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId3'
cel1.innerHTML = item3;
cel2.innerHTML = document.getElementById("qty3").value;
cel3.innerHTML = "PHP"+price3*iii;
}
function d(){
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId4'
cel1.innerHTML = item4;
cel2.innerHTML = document.getElementById("qty4").value;
cel3.innerHTML = "PHP"+price4*iiii;
}
input{
width: 40px;
height: 25px;
text-align: center;
}
<p>Apple</p>
<p>PHP<s> 24 </s> PHP 14</p>
<button type="button" onclick="decreClick1()">-</button>
<input type="text" name="quantity" value="0" id="qty1" />
<button type="button" onclick="buttonClick1()">+</button>
<br><br>
<button type="button" onclick="a()">Add to cart</button>
<p>Boy</p>
<p>PHP<s> 34 </s> PHP 24</p>
<button type="button" onclick="decreClick2()">-</button>
<input type="text" name="quantity" value="0" id="qty2" />
<button type="button" onclick="buttonClick2()">+</button>
<br><br>
<button type="button" onclick="b()">Add to cart</button>
<p>Cat</p>
<p>PHP<s> 44 </s> PHP 34</p>
<button type="button" onclick="decreClick3()">-</button>
<input type="text" name="quantity" value="0" id="qty3" />
<button type="button" onclick="buttonClick3()">+</button>
<br><br>
<button type="button" onclick="c()">Add to cart</button>
<p>Dog</p>
<p>PHP<s> 54 </s> PHP 44</p>
<button type="button" onclick="decreClick4()">-</button>
<input type="text" name="quantity" value="0" id="qty4" />
<button type="button" onclick="buttonClick4()">+</button>
<br><br>
<button type="button" onclick="d()">Add to cart</button>
<table style="width:50%" border="1" id="table1">
<caption><b>Cart List:<b></caption>
<tr>
<th>Item</th>
<th>Quantity</th>
<th>Price</th>
</tr>
<tr>
<td> </td>
<td><b>Total:</b></td>
<td id="total"></td>
</tr>
</table>
这里的问题是,当我输入一个数量并单击它转到表格的按钮时,我无法获得我使用的添加单元格的总和 tot = document.getElementById("total").innerHTML = celid1+celid2+celid3+celid4;
最佳答案
快速回答:
const val = parseInt(document.getElementById("qty3").value, 10);
const total = document.getElementById('total');
if (total.innerHTML === '') {
total.innerHTML = val;
} else {
total.innerHTML = parseInt(total.innerHTML, 10) + val;
}
我应该说你的代码太大了。您应该使用函数、值数组和循环。
var i = 0;
var ii = 0;
var iii = 0;
var iiii = 0;
function buttonClick1() {
i++;
document.getElementById("qty1").value = i;
}
function decreClick1() {
if (i <= 0)
return;
i--;
document.getElementById("qty1").value = i;
}
function buttonClick2() {
ii++;
document.getElementById("qty2").value = ii;
}
function decreClick2() {
if (ii <= 0)
return;
ii--;
document.getElementById("qty2").value = ii;
}
function buttonClick3() {
iii++;
document.getElementById("qty3").value = iii;
}
function decreClick3() {
if (iii <= 0)
return;
iii--;
document.getElementById("qty3").value = iii;
}
function buttonClick4() {
iiii++;
document.getElementById("qty4").value = iiii;
}
function decreClick4() {
if (iiii <= 0)
return;
iiii--;
document.getElementById("qty4").value = iiii;
}
var price1 = 14;
var price2 = 24;
var price3 = 34;
var price4 = 44;
var item1 = "apple";
var item2 = "boy";
var item3 = "cat";
var item4 = "dog";
function a() {
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId1'
cel1.innerHTML = item1;
cel2.innerHTML = document.getElementById("qty1").value;
cel3.innerHTML = "PHP" + price1 * i;
const val = parseInt(document.getElementById("qty1").value, 10);
const total = document.getElementById('total');
if (total.innerHTML === '') {
total.innerHTML = val;
} else {
total.innerHTML = parseInt(total.innerHTML, 10) + val;
}
}
function b() {
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId2'
cel1.innerHTML = item2;
cel2.innerHTML = document.getElementById("qty2").value;
cel3.innerHTML = "PHP" + price2 * ii;
const val = parseInt(document.getElementById("qty2").value, 10);
const total = document.getElementById('total');
if (total.innerHTML === '') {
total.innerHTML = val;
} else {
total.innerHTML = parseInt(total.innerHTML, 10) + val;
}
}
function c() {
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId3'
cel1.innerHTML = item3;
cel2.innerHTML = document.getElementById("qty3").value;
cel3.innerHTML = "PHP" + price3 * iii;
const val = parseInt(document.getElementById("qty3").value, 10);
const total = document.getElementById('total');
if (total.innerHTML === '') {
total.innerHTML = val;
} else {
total.innerHTML = parseInt(total.innerHTML, 10) + val;
}
}
function d() {
var table = document.getElementsByTagName('table')[0];
var newRow = table.insertRow(1);
var cel1 = newRow.insertCell(0);
var cel2 = newRow.insertCell(1);
var cel3 = newRow.insertCell(2);
cel3.id = 'celId4'
cel1.innerHTML = item4;
cel2.innerHTML = document.getElementById("qty4").value;
cel3.innerHTML = "PHP" + price4 * iiii;
const val = parseInt(document.getElementById("qty4").value, 10);
const total = document.getElementById('total');
if (total.innerHTML === '') {
total.innerHTML = val;
} else {
total.innerHTML = parseInt(total.innerHTML, 10) + val;
}
}
input {
width: 40px;
height: 25px;
text-align: center;
}
<html>
<body>
<p>Apple</p>
<p>PHP<s> 24 </s> PHP 14</p>
<button type="button" onclick="decreClick1()">-</button>
<input type="text" name="quantity" value="0" id="qty1" />
<button type="button" onclick="buttonClick1()">+</button>
<br><br>
<button type="button" onclick="a()">Add to cart</button>
<p>Boy</p>
<p>PHP<s> 34 </s> PHP 24</p>
<button type="button" onclick="decreClick2()">-</button>
<input type="text" name="quantity" value="0" id="qty2" />
<button type="button" onclick="buttonClick2()">+</button>
<br><br>
<button type="button" onclick="b()">Add to cart</button>
<p>Cat</p>
<p>PHP<s> 44 </s> PHP 34</p>
<button type="button" onclick="decreClick3()">-</button>
<input type="text" name="quantity" value="0" id="qty3" />
<button type="button" onclick="buttonClick3()">+</button>
<br><br>
<button type="button" onclick="c()">Add to cart</button>
<p>Dog</p>
<p>PHP<s> 54 </s> PHP 44</p>
<button type="button" onclick="decreClick4()">-</button>
<input type="text" name="quantity" value="0" id="qty4" />
<button type="button" onclick="buttonClick4()">+</button>
<br><br>
<button type="button" onclick="d()">Add to cart</button>
<table style="width:50%" border="1" id="table1">
<caption><b>Cart List:<b></caption>
<tr>
<th>Item</th>
<th>Quantity</th>
<th>Price</th>
</tr>
<tr>
<td> </td>
<td><b>Total:</b></td>
<td id="total"></td>
</tr>
</table>
</body>
</html>
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