购物车
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript">
function sum(){
var chone = document.getElementsByName("chkone");
var money = document.getElementsByName("each_money");
var summ = 0;
for(var i = 0;i<chone.length;i++){
if(chone[i].checked){
summ+=Number(money[i].value);
}
}
document.getElementById("total").value = summ;
}
</script>
</head>
<body>
<form>
<table border="1" width="400" cellpadding="0" cellspacing="0">
<tr>
<td width="50">金额</td>
<td></td>
<td>是否求和</td>
</tr>
<tr>
<td width="50"><input type="text" name="each_money"/></td>
<td></td>
<td><input type="checkbox" name="chkone"/></td>
</tr>
<tr>
<td width="50"><input type="text" name="each_money"/></td>
<td></td>
<td><input type="checkbox" name="chkone"/></td>
</tr>
<tr>
<td width="50"><input type="text" id="total" readonly="readonly" /></td>
<td>金额合计</td>
<td><input type="button" onclick="sum();" value="求和"/></td>
</tr>
</table>
</form>
</body>
</html>
全选
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript">
function all1(){
// alert("234");
var all = document.getElementById("all");
var qx = document.getElementsByName("qx");
for(var i = 0;i<qx.length;i++){
qx[i].checked=all.checked;
}
}
function one(){
// alert("wer");
var all = document.getElementById("all");
var qx = document.getElementsByName("qx");
var count = 0;
for(var i = 0;i<qx.length;i++){
if(!qx[i].checked){
all.checked=false;
}else{
count++;
}
}
if(qx.length==count){
all.checked = true;
}
/* if(count==qx.length){
all.checked=true;
}else{
all.checked=false;
} */
}
</script>
</head>
<body>
<input type="checkbox" name="all" id="all" onclick="all1();" />全选
<table border="1px" cellspacing="0" cellpadding="0">
<tr><th><input type="checkbox" name="qx" id="qx" value="1" onclick="one();"/></th><td>用户1</td></tr>
<tr><th><input type="checkbox" name="qx" id="qx" value="2" onclick="one();"/></th><td>用户2</td></tr>
</table>
</body>
</html>
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