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Thread: [RESOLVED] Calling parent with new parameters.

  1. #1
    Join Date
    Sep 2008
    Location
    Jackson MS
    Posts
    373

    resolved [RESOLVED] Calling parent with new parameters.

    I have a mortgage calculator which can produce the following table when "Gen P.I. in new window" is selected (options were 20,000 at 5% for 6 years):
    Code:
        Date      Payment   Interest    AppPrin  Principal
    
      04/21/13                                    20000.00
      05/21/13     322.10      83.33     238.77   19761.23
      06/21/13     322.10      82.34     239.76   19521.47
      07/21/13     322.10      81.34     240.76   19280.71
      08/21/13     322.10      80.34     241.76   19038.95
      09/21/13     322.10      79.33     242.77   18796.18
      10/21/13     322.10      78.32     243.78   18552.40
      11/21/13     322.10      77.30     244.80   18307.60
      12/21/13     322.10      76.28     245.82   18061.78
      01/21/14     322.10      75.26     246.84   17814.94
      02/21/14     322.10      74.23     247.87   17567.07
    ---------------snip-------------------
    If the user wants to change the monthly amount at a future date, I would like to put a link under the date or Principal so these values are filled in. For example, if the user picks 10/21/13 (or 18552.40), I would like for the principal and loan date to change in the parent window. If I could close the PI window at the same time it would be that much better.

    This is my current PI function:
    Code:
    function genpi(parm) {
      var appprin
      var piprin = principal
      var monthlyint
      var pimonthly = monthly
      var lastTarget = monthly / (1 + interest);
      var html = "<html><head><title>PI Report</title></head><body><pre>\n";
      html = html + "    Date      Payment   Interest    AppPrin  Principal\n\n  " +
                   formatDate(m1,d1,y1) + "                                   " +
                   Nformat(round(piprin)) + "\n"
      while (piprin > 0) {
        monthlyint = piprin * interest;
        if (piprin <= lastTarget) {
          pimonthly = round(piprin + monthlyint)
          appprin = piprin
          piprin = 0;
        }
        else {
          appprin = pimonthly - monthlyint
          piprin -= round(appprin)
        }
        ++m1;
        if (m1 > 12)
          ++y1,m1=1;
        html = html + "  " + formatDate(m1,d1,y1) + "  " +Nformat(pimonthly) + "  " +
                      Nformat(round(monthlyint)) + "  " + Nformat(round(appprin)) +
                      "  " + Nformat(round(piprin)) + "\n"
      }
      html = html + "</pre></body></html>";
      if (parm == "0")
        document.write(html);
      else {
        var wHeight = 85 + payments * 16
        var wWidth  = 475
        var AvailWidth  = window.screen.availWidth
        var hOffset = parseInt(AvailWidth/2) - parseInt(wWidth/2)
        var wOption = "resizable,status,scrollbars,width=" + wWidth + ",height=" + wHeight +
                      ",left=" + hOffset
    
        var w = window.open("","gentable",wOption);
        w.document.write (html);
        w.document.close();
      }
      monthly = ""; //  To force recalculation for different values
    }
    TIA

  2. #2
    Join Date
    Sep 2008
    Location
    Jackson MS
    Posts
    373
    I didn't solve the problem, just evaded it. The Principal-Interest (P.I.) window now has line numbers which can be used (after closing the window) to initialize the original screen with the remaining principal, prevailing interest rate, and new "date" of the loan. Link is in first message.

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