There's two text box that has to enter the the numbers from the user and below I want to display the total value the user inputed. How can I sum it up and have it displayed every they enter a number? -
<td><b> Total</b></td><td>
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Quantity #1 <Input type = 'text' Value ='0' Name ='qty1' >
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Quantity #2 <Input type = 'text' Value ='0' Name ='qty2'>
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Grand Total <input type = 'text' value ='<?php qty1 + qty2 ?>' name ='Total' >
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Or should I use a java script?
Can somebody show me how its done on JAVA technically no knowlege at all. A newbie learning to walk.
21  2961  hsriat 1,654
Recognized Expert Top Contributor @ddtpmyra
It will need JavaScript (not Java) dear. -
Quantity #1 <Input type = 'text' Value ='0' Name ='qty1' onkeyup='if ((this.value.match(/^[0-9]+$/) && this.form.qty2.value.match(/^[0-9]+$/))) this.form.Total.value = this.value + this.form.dty2.value; else this.form.Total.value = "";'>
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Quantity #2 <Input type = 'text' Value ='0' Name ='qty2' onkeyup='if ((this.value.match(/^[0-9]+$/) && this.form.qty1.value.match(/^[0-9]+$/))) this.form.Total.value = this.value + this.form.dty1.value; else this.form.Total.value = "";'>
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Grand Total <input type = 'text' value ='' name ='Total' >
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 dlite922 1,584
Recognized Expert Top Contributor
Hey ddtpmyra,
First you need to understand what PHP, Java, and JavaScript are. Besides languages, they have nothing else in common.
PHP is non-compiled script that is executed and run on the server. The output is plain text (or HTML).
Java is a compiled programming language that stands alone and runs on the computer it is executed on.
JavaScript is a scripting language in a web page that is executed within the user's web browser.
My recommendation for you is to read tutorials. One site that helps you with all of this and much more (and is a site we all basically started with) is www.w3schools.com Start there.
As to your problem, I would do this in JavaScript because it's trivial, quicker (no refresh), and pretty easy.
To get you interested, here's some code: -
-
<html>
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<head><title>Calculator</title></head>
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<script language="JavaScript" type="text/JavaScript">
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function calSum()
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{
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var num1 = parseInt(document.getElementById('firstNum').value);
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var num2 = parseInt(document.getElementById('secNum').value);
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document.getElementById('result').innerHTML = (num1 + num2);
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return;
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}
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</script>
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<body>
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First Number: <input type="text" value="" name="firstNum" id="firstNum" /><br/>
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Second Number: <input type="text" value="" name="secNum" id="secNum" /><br/>
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<input type="button" value="Calculate Sum" onclick="calSum();" /><br/>
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Answer: <span id="result"></span>
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</body>
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<html>
-
-
put that in a file, name it calculator.html and open it with your web browser.
to change and mess around with it, open it in notepad, change then save it. Refresh your browser to see your changes.
Good Luck!
Dan
dlite922 1,584
Recognized Expert Top Contributor
If you had trouble getting hsriat's code to work because it concatenated the values instead of summing this, he made the same mistake I did, and you will make by not calling the "parseInt() " function first:
here's the updated, working code: -
<form name="myForm" >
-
Quantity #1 <Input type = 'text' Value ='0' Name ='qty1' onkeyup='if ((this.value.match(/^[0-9]+$/) && this.form.qty2.value.match(/^[0-9]+$/))) this.form.Total.value = parseInt(this.value) + parseInt(this.form.qty2.value); else this.form.Total.value = "";'>
-
Quantity #2 <Input type = 'text' Value ='0' Name ='qty2' onkeyup='if ((this.value.match(/^[0-9]+$/) && this.form.qty1.value.match(/^[0-9]+$/))) this.form.Total.value = parseInt(this.value) + parseInt(this.form.qty1.value); else this.form.Total.value = "";'>
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Grand Total <input type = 'text' value ='' name ='Total' >
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</form>
-
-
hsriat 1,654
Recognized Expert Top Contributor @dlite922
That usually happens when you think only "." (dot) can be used for concatenation.
Thanks for the rectification. :)
Cheers
[EDIT: And I have the right for making this excuse as we are in PHP forum ;)]
dlite922,
First thanks for the code it works perfecty fine but I have <form> already on top it all and my button didn't work after adding it? Is this true you cannot have sub <form> inside PHP please correct me if I'm wrong. Or is there a another way to do the automatic computation without using <form>?
thanks! @dlite922 dlite922 1,584
Recognized Expert Top Contributor @ddtpmyra
you don't have to use form. Instead of using "this.form" make sure the element has an "id" attribute and refer to it with "document.getEl ementById("theI Dhere").value"
make sure you spell "getElementById " <-- exactly like that. JavaScript is case sensitive.
Then you're not dependent on <form>
Cheers,
Dan
Dan,
Thanks for all the help. It works!
DM
please disregard this post
Dormilich 8,658
Recognized Expert Moderator Expert @ddtpmyra
this is not a matter of PHP. the HTML standard does not allow <form> inside another <form>.
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