I want to subtract text value have class in jquery
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Sum of all TextBox values using jQuery</title>
<script type="text/javascript"
src="http://ajax.microsoft.com/ajax/jQuery/jquery-1.4.2.min.js">
</script>
<script type="text/javascript">
$(function() {
$("#addAll").click(function() {
var add = 0;
$(".amt").each(function() {
add -= Number($(this).val());
});
$("#para").text("Sum of all textboxes is : " + add);
});
});
</script>
</head>
<body>
<input id="Text1" class="amt" type="text" /><br />
<input id="Text2" class="amt" type="text" /><br />
<input id="Text3" class="amt" type="text" /><br />
<input id="addAll" type="button" value="Sum all Textboxes" /><br />
<p id="para" />
</body>
</html>
but i couldn't get the actual result. please help 开发者_运维问答me
Try:
$(function() {
$("#addAll").click(function() {
var add = 0;
$(".amt").each(function() {
add += parseInt($(this).val() || 0, 10);
});
$("#para").text("Sum of all textboxes is : " + add);
});
});
Using parseInt. Additionally, you should use += if you're trying to sum the values.
Here it is working: http://jsfiddle.net/S9H6A/
Update: If you're trying to subtract all values in the text boxes, then your problem is that you're initializing the total to 0. Try something like this instead (Also added code from @Praveen's answer which uses || 0 to default empty inputs to 0):
$(function() {
$("#addAll").click(function() {
var total;
$(".amt").each(function() {
if (typeof total === 'undefined') {
total = parseInt($(this).val() || 0, 10);
}
else {
total -= parseInt($(this).val() || 0, 10);
}
});
$("#para").text("Sum of all textboxes is : " + total);
});
});
Updated example: http://jsfiddle.net/S9H6A/4/
replace this add -= Number($(this).val()); with add -= parseInt($(this).val()|| 0,10);
加载中,请稍侯......
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