this codes: HTML: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <script type= "text/javascript"> function startCalc(){ interval = setInterval("calc()",1); } function calc(){ var qty = new Array(2); qty[0] = parseFloat(document.myform.inqty.value); qty[1] = parseFloat(document.myform.outqty.value); myqtyval = qty[0]-qty[1]; document.myform.myqty.value = myqtyval; } function stopCalc(){ clearInterval(interval); } </script> </head> <body> <form name='myform' action='test.php' method='post'> Input<input type='text' name='inqty' onFocus='startCalc();' onBlur='stopCalc();' /> Output<input type='text' name='outqty' onFocus='startCalc();' onBlur='stopCalc();' /><br/> myqty<input type='text' name='myqty' value='' /> <input type='submit' name='submit' value='save' /> </form> </body> </html> has the concept of what i want that after i insert number in output the result was automatically appear in qty but the problem in this code it did not use on key enter and I don't know how can i put that code n my php file where I attach. I'm sorry, i do understand the concept but I don't know how can I code it and where i can put the codes. Thank you..
