<script>
//商品修改
function updateCart(index,num){
var curForm=document.getElementById("form"+index);
if((curForm.num.value-(-num)<=0)){
alert("请输入正确的数量!");
}else{
curForm.num.value = curForm.num.value-(-num);
curForm.submit();
}
}
function changeNum(index){
var curForm = document.getElementById("form"+index);
if(curForm.num.value<=0){
alert("请输入正确的数量!");
curForm.num.value = 1;
}else{
curForm.submit();
}
}
<script>
<body>
<a onclick="updateCart(<%=i%>,-1)">-</a>
<input type="text" size="2" name="num" id="num" onChange="changeNum(<%=i %>)" value="<%=c.getNum() %>" />
<a onclick="updateCart(<%=i%>,1)">+</a>
</body>里面的index除了能获取索引号,还有什么功能?
//商品修改
function updateCart(index,num){
var curForm=document.getElementById("form"+index);
if((curForm.num.value-(-num)<=0)){
alert("请输入正确的数量!");
}else{
curForm.num.value = curForm.num.value-(-num);
curForm.submit();
}
}
function changeNum(index){
var curForm = document.getElementById("form"+index);
if(curForm.num.value<=0){
alert("请输入正确的数量!");
curForm.num.value = 1;
}else{
curForm.submit();
}
}
<script>
<body>
<a onclick="updateCart(<%=i%>,-1)">-</a>
<input type="text" size="2" name="num" id="num" onChange="changeNum(<%=i %>)" value="<%=c.getNum() %>" />
<a onclick="updateCart(<%=i%>,1)">+</a>
</body>里面的index除了能获取索引号,还有什么功能?
解决方案 »
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