scriptlet gets executed wrongly
The following code:
<button type="button" id="button" onclick="<%cart.removeItem(0);%>">Click me</button>
is suppose to be executed when the button is clicked. However,
"<%cart.removeItem(0);%>"
is being executed when page is refreshed without clicking the button. Why is this happening?
Cheers.
Heres the full source.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<jsp:useBean id="cart" scope="session" class="myBeans.cart" />
<%
cart.addItem("aji", "1000", "1");
cart.addItem("ewer", "200", "1");
cart.addItem("dfwerweji", "10", "1");
cart.addItem("ldsjioi", "1320", 开发者_如何学运维"1");
String[] prodNames = cart.getProdNames();
double[] prices = cart.getProdPrices();
int[] qtys = cart.getProdQtys();
double total = 0;
for(int i=0; i<prodNames.length; i++){
total += prices[i]*qtys[i];
out.println(prodNames[i]);
out.println(" " + prices[i] + " ");
out.println("<input type=text name=newQty value=" + qtys[i] + ">");
out.println(" " + prices[i] * qtys[i]);
}
%>
<br/>
<button type="button" id="button" onclick="<%cart.removeItem(0);%>">Click me</button>
</body>
</html>
I think you are mixing up your languages here. I suspect that 'cart' is a Java object, and you can only modify JavaScript objects on the client side. You would have to have something like this to make it work:
<script>
doRemoveFirst = function() { new Ajax.Request('removeFirst.page'); };
</script>
<button type="button" id="button" onclick="doRemoveFirst();">Click me</button>
Then have a page on the server called 'removeFirst' that will remove that object from the Java object (maybe kept in session?) and you can update your page accordingly.
EDIT: Here's an image to help. Everything left of diagonal is client-side, while everything right is server-side.
EDIT 2: To remove and fix the page for the user
I would say something like (assuming jQuery) this might work for you.
$(".item-row").first().remove();
$(".item-row").each(function(idx, el) {
var elem = $(el).children().find('.index-cell');
elem.text(+elem.text() - 1);
});
加载中,请稍侯......
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