extract a numerical value entry from a text field??

UNO · #1 (**permalink**) 05-01-2007, 02:47 AM

how would i use javascript to extract a numerical value entry from a text field, multiply that by a price and automaticaly update a total?

Tomi91 · #2 (**permalink**) 05-01-2007, 02:52 AM

You will just have to do a ParseInt function on the text field variable to get the number value. and then you can peform any mathematical operation using javascript.

The below link has an example and code similar to what you are after

ManuelStockwell · #3 (**permalink**) 05-01-2007, 03:23 AM

Save this in a File say ABC.html and then Open.

<HTML>
<Head>
<Style>
#NB
{
border-style=none;
border=0px;
}

</Style>

<Script>
function Calculate()
{
Q=eval(document.frm.txtQty.value);
P=eval(document.frm.txtPrice.value);
document.frm.txtResult.value= "Result is " + (Q*P);
}
</Script>
</Head>
<Body>
<Form Name=frm>
<Pre>
Enter Quantity : <Input Type=Text name=txtQty Value=0 MaxLength=5 onKeyUp=Calculate()><Br>
Enter Price : <Input type=Text Name=txtPrice Value=0 Maxlength=5 onKeyUp=Calculate()><Br><Br>
<Input Type=Text Name=txtResult ID=NB>
</pre>

</Form>
</Body>
</HTML>

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