calculation

[kamsmartx]

hi
I want to work with a simple calculation to be introduced and let the value of 0.05 in this place

<input type="text" name="Cover" id="Cover" align="right" style="background:#CCCCFF"/> 

The product emerges in this place

<input name="Deduction" id="Deduction" type="text" align="right" style="background:#CCCCFF"  />

So the process is valuable inputs - 0,100

[SuPerNoVi]

I've just done some calculation in my project but I'm struggling to understand what you want to do. If you could explain better I could assist.

[kamsmartx]

i wont to calculation the enter value from

<input type="text" name="Cover" id="Cover" align="right" style="background:#CCCCFF"/>

by substract (-)
with 0.100
and the result print into

<input name="Deduction" id="Deduction" type="text" align="right" style="background:#CCCCFF"  />

example:-
0.05 - 0.100 = 0.50

[leatherback]

Kams: As before: Dop you realize that PHP runs on the server, not on the clients comp[uter. So that all the calculations you do are done through a submit, OR through javascript. In the latter case you would need to write a little function, e.g.,

function calculate_it(StartValue)
  {
  document.getElementById('Deduction').value = StartValue-0.1;
  }

and use that like:

<input type="text" name="Cover" id="Cover" align="right" style="background:#CCCCFF" onchange="calculate_it(this.value)"/> 

[SuPerNoVi]

I'd personally do the calculation using javascript and call it onChange.

Use a function like this...

function calculate()
{
var cal = document.getElementById(Cover).value;
var deduction = 0.100;

var result = cal - deduction;
document.getElementById(Deduction).value = result;
}

And call it on the input like this...

<input type="text" name="Cover" id="Cover" align="right" style="background:#CCCCFF" onChange="calculate();" /> 

Doing it this way means you don't need to post the page every single time the value is changed.

[kamsmartx]

leatherback wrote:

Kams: As before: Dop you realize that PHP runs on the server, not on the clients comp[uter. So that all the calculations you do are done through a submit, OR through javascript. In the latter case you would need to write a little function, e.g.,

function calculate_it(StartValue)
  {
  document.getElementById('Deduction').value = StartValue-0.1;
  }

and use that like:

<input type="text" name="Cover" id="Cover" align="right" style="background:#CCCCFF" onchange="calculate_it(this.value)"/> 

Error

[kamsmartx]

SuPerNoVi wrote:

I'd personally do the calculation using javascript and call it onChange.

Use a function like this...

function calculate()
{
var cal = document.getElementById(Cover).value;
var deduction = 0.100;

var result = cal - deduction;
document.getElementById(Deduction).value = result;
}

And call it on the input like this...

<input type="text" name="Cover" id="Cover" align="right" style="background:#CCCCFF" onChange="calculate();" /> 

Doing it this way means you don't need to post the page every single time the value is changed.

thanke u its true good