这是我的代码:
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".input").bind("change keyup", function(){
var val1 = +$(".value1").val();
var val2 = +$(".value2").val();
var val3 = +$(".value3").val();
var val4 = +$(".value4").val();
$("#result").val(val1+val2+val3+val4);
});
});
</script>
</head>
<body>
<select class="input value1">
<option value="">Choose</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select class="input value2">
<option value="">Choose</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select class="input value3">
<option value="">Choose</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<input type="text" class="input value4">
<input type="text" disabled="disabled" id="result">
</body>
</html>
我想仅在填写或选择所有字段时显示结果。此外,在禁用的文本字段中,我想在未填充某些字段时打印“必须检查每个字段”之类的消息。如何修改此代码才能实现此目的?
答案 0 :(得分:0)
就这样做:
$(document).ready(function(){
$(".input").bind("change keyup", function(){
var val1 = +$(".value1").val();
var val2 = +$(".value2").val();
var val3 = +$(".value3").val();
var val4 = +$(".value4").val();
if(parseFloat(val1) > 0 && parseFloat(val2) > 0 && parseFloat(val3) > 0 && parseFloat(val4) > 0) {
$("#result").val(val1+val2+val3+val4);
}
else {
$("#result").val('You must check every field');
}
});
});