on-site Calculator

On your web site, this script will look something like this:

Description:
This script allows you to set up a functioning calculator for your visitors to use. Good for financial sites or to allow visitors to calculate taxes, fees, etc.

HTML/DHTML/JavaScript script code: (to copy and paste) <head> <script language="JavaScript">  </script> </head> <body onLoad="clear()"> <form name="form1" method="POST" onSubmit="{upda(); calc(); return false;}"> <table border bgcolor=buttonface> <tr><td colspan=5 align=center bgcolor=#c0c0c0><input type="text" size=16 maxlength=80 name="text1" value="" onChange="upda()"></td></tr> <tr><td align=center> <input type="button" value=" 7 " onClick="app('7')"></td> <td align=center><input type="button" value=" 8 " onClick="app('8')"></td> <td align=center><input type="button" value=" 9 " onClick="app('9')"></td> <td align=center><input type="button" value=" / " onClick="app('/')"></td> <td align=center> <input type="button" value=" C " onClick="clear()"></td></tr> <tr><td align=center> <input type="button" value=" 4 " onClick="app('4')"></td> <td align=center><input type="button" value=" 5 " onClick="app('5')"></td> <td align=center><input type="button" value=" 6 " onClick="app('6')"></td> <td align=center><input type="button" value=" * " onClick="app('*')"></td> <td align=center> <input type="button" value=" ( " onClick="app('(')"></td></tr> <tr><td align=center> <input type="button" value=" 1 " onClick="app('1')"></td> <td align=center><input type="button" value=" 2 " onClick="app('2')"></td> <td align=center><input type="button" value=" 3 " onClick="app('3')"></td> <td align=center><input type="button" value=" - " onClick="app('-')"></td> <td align=center> <input type="button" value=" ) " onClick="app(')')"></td></tr> <tr><td align=center> <input type="button" value=" 0 " onClick="app('0')"></td> <td></td> <td align=center><input type="button" value=" . " onClick="app('.')"></td> <td align=center><input type="button" value=" + " onClick="app('+')"></td> <td align=center> <input type="button" value=" = " onClick="calc()"></td></tr> </table> </form>