var question = "What command do you use to change directories? (Type in cd and hit the Enter key.)".bold(); var instructorStr = "cd"; var explStr = "This is where you'll find an explanation of the question and answer. To change to your home directory, you type cd (change directory). As you may already know, Linux is case-sensitive. For example, the cd is not the same as CD."; // Global convenience strings to simplify modifying The Question and alert feedback messages html formatting var begQF = ""; var endQF = "<\/FONT>
 
"; var dialogStr =" Try again?\n\nClick 'OK' to try again.\nClick 'Cancel' to see the answer."; var begAlrt = '<\/TD><\/TD><\/TD>'; var endAlrt = '<\/FONT><\/TD><\/TR>'; var d = this.document; function validateCom (studentStr) { // Convenience function to format alert feedback function addSummary (theText) { summaryStr += begAlrt; summaryStr += theText; summaryStr += endAlrt; } // Creates pop-up window with validation report function displayResult() { var w = window.open ("", "theResult", "height=400,width=770,resizable=yes,scrollbars=yes,status=no,menubar=no"); w.focus(); // brings result window to top var d = w.document; // Convenience function to format console feedback output function writeTTY (theText) { d.write ('<\/TD>'); d.write ('' + theText.bold().fontsize(3) + '<\/TT><\/TD>'); d.write ('<\/TD><\/TR>'); } // Begin writing out pop-up feedback window d.write ( ' ' + 'Quick Check Results<\/TITLE><\/HEAD>' + ' <BODY BGCOLOR="#FFFFFF">' + ' <TABLE WIDTH="700" BGCOLOR="#FFFFFF" CELLSPACING="0" CELLPADDING="0" BORDER="0">' + ' <TR>' + ' <TD><IMG SRC="../common/images/blank.gif" HEIGHT="10" WIDTH="32"><\/TD>' + // Q ' <TD><IMG SRC="../common/images/blank.gif" HEIGHT="10" WIDTH="128"><\/TD>' + // corr & your answer labels ' <TD><IMG SRC="../common/images/blank.gif" HEIGHT="10" WIDTH="5"><\/TD>' + // space in beginning result ' <TD><IMG SRC="../common/images/blank.gif" HEIGHT="10" WIDTH="15"><\/TD>' + // extra space for alert icon column in validation ' <TD><IMG SRC="../common/images/blank.gif" HEIGHT="10" WIDTH="515"><\/TD>' + // result output ' <TD><IMG SRC="../common/images/blank.gif" HEIGHT="10" WIDTH="5"><\/TD>' + // final space result ' <\/TR>' + ' <TR VALIGN="TOP">' + ' <TD><IMG SRC="../common/images/q_w.gif" ALT="Q" WIDTH="22" HEIGHT="25" ALIGN="LEFT"><\/TD>' + ' <TD COLSPAN="4">' + begQF + question + endQF + '<\/TD>' + ' <\/TR>' + ' <TR>' + ' <TD COLSPAN="5"><IMG SRC="../common/images/blank.gif" HEIGHT="15"><\/TD>' + ' <\/TR>' + ' <TR VALIGN="TOP">' + ' <TD ROWSPAN="8"><IMG SRC="../common/images/a_w.gif" ALT="A" WIDTH="22" HEIGHT="25" ALIGN="LEFT">' + ' <TD><\/TD>' + ' <TD COLSPAN="4" BGCOLOR="#000033"><IMG SRC="../common/images/blank.gif" HEIGHT="3"><\/TD>' + ' <\/TR>' + ' <TR>' + ' <TD ALIGN="LEFT"><IMG SRC="../common/images/corr_ans.gif" ALT="Correct answer:" WIDTH="118" HEIGHT="8">' ); writeTTY (instructorStr.fontcolor("#FFFFFF")); d.write ( ' <TR>' + ' <TD><\/TD>' + ' <TD COLSPAN="4" BGCOLOR="#000033"><IMG SRC="../common/images/blank.gif" HEIGHT="3"><\/TD>' + ' <\/TR>' + ' <TR>' + ' <TD COLSPAN="5"><IMG SRC="../common/images/blank.gif" HEIGHT="5"><\/TD>' + ' <\/TR>' + ' <TR>' + ' <TD><\/TD>' + ' <TD COLSPAN="4" BGCOLOR="#000033"><IMG SRC="../common/images/blank.gif" HEIGHT="3"><\/TD>' + ' <\/TR>' + ' <TR>' + ' <TD ALIGN="LEFT"><IMG SRC="../common/images/your_ans.gif" ALT="Your answer:" WIDTH="118" HEIGHT="8">' ); writeTTY (resultStr); d.write ( ' <TR>' + ' <TD><\/TD>' + ' <TD COLSPAN="4" BGCOLOR="#000033"><IMG SRC="../common/images/blank.gif" HEIGHT="3"><\/TD>' + ' <\/TR>' + ' <TR>' + ' <TD COLSPAN="5"><IMG SRC="../common/images/blank.gif" HEIGHT="10"><\/TD>' + ' <\/TR>' ); d.write (summaryStr); if (explStr.length > 0) { d.write ( ' <TR>' + ' <TD><\/TD>' + ' <TD><\/TD>' + ' <TD COLSPAN="3"><FONT SIZE="4" FACE="Helvetica, Arial" COLOR="#003366"><BR>Explanation:<\/FONT><BR>' + ' <FONT SIZE="3" FACE="Helvetica, Arial">' + explStr + '<\/FONT><\/TD>' + ' <\/TR>' ); } d.write ('<\/TABLE><BR> <BR>'); d.close(); } var resultStr = ""; // initialize feedback string of studentStr validation var summaryStr = ""; // initialize explanation string, results of validation var errCount = 0; // how many errors found on first pass? var instructorArr = instructorStr.split(/\s+/); var studentArr = studentStr.split(/\s+/); // For nav bug, initial "space" word if (studentArr[0].length == 0) { studentArr = studentArr.slice (1); // drop the first spurious NaN element } // Convenience variables var instructLen = instructorArr.length; var studentLen = studentArr.length; // Validation flags -- if flags are true, validated successfully for that condition var answerV = true; var underV = !(studentLen < instructLen); var overV = !(studentLen > instructLen); var orderV = true; // order correct for terms? Assume not a problem var caseV = true; // case correct for terms? Assume not a problem. var matchesV = true; // ...means everything is hunky-dory. Assume it is. // Validation checks if (!underV) { var errString = "Not enough terms."; if (confirm (errString + dialogStr)) { return false; } addSummary (errString); } if (!overV) { var errString = "Too many terms."; if (confirm (errString + dialogStr)) { return false; } addSummary (errString); } // Check for no student response if (!studentArr[0]) { answerV = false; resultStr = "/s"; } else if (studentArr[0].length == 0) { answerV = false; resultStr = "/s"; } else // Check term for term, build color-coded result string, check for case in order { for (var i = 0; i < studentArr.length; i++) { if (i >= instructLen) { matchesV = false; resultStr += (studentArr[i].fontcolor ("#FFCC00") + " "); errCount++; if ((i < instructLen) && ((instructorArr[i] != studentArr[i]) && (instructorArr[i].toLowerCase() == studentArr[i].toLowerCase()))) { caseV = false; } } else if (instructorArr[i] != studentArr[i]) { matchesV = false; resultStr += (studentArr[i].fontcolor ("#FFCC00") + " "); errCount++; if ((i < instructLen) && ((instructorArr[i] != studentArr[i]) && (instructorArr[i].toLowerCase() == studentArr[i].toLowerCase()))) { caseV = false; } } else { resultStr += (studentArr[i].fontcolor ("#FFFFFF") + " "); } } } if (!caseV && answerV) { var errString = "At least one term is incorrectly capitalized."; if (underV && overV) { if (confirm (errString + dialogStr)) { return false; } } addSummary (errString); } // Validation check for out of order if (!matchesV && answerV) { checkAll: for (var i = 0; i < instructLen; i++) { checkStudent: for (var j = 0; j < studentLen; j++) { if ((instructorArr[i].toLowerCase() == studentArr[j].toLowerCase()) && (i != j)) { for (var k = 0; k < j; k++) // don't want to flag repetition of an out of order twice for 2 occurences same word { if (studentArr[k].toLowerCase() == studentArr[j].toLowerCase()) { continue checkStudent; } } orderV = false; if (instructorArr[i] != studentArr[j]) { var errString = "At least one term is out of order and incorrectly captitalized."; if (underV && overV && caseV) { if (confirm (errString + dialogStr)) { return false; } } addSummary (errString); } else { var errString = "At least one term is correct but out of order."; if (underV && overV && caseV) { if (confirm (errString + dialogStr)) { return false; } } addSummary (errString); } break checkAll; } } } } // Default validation check: wrong for no other obvious reason if (!matchesV && (overV && underV && caseV && orderV)) { if (errCount == 1) { if (confirm ("One term is incorrect." + dialogStr)) { return false; } } else { if (confirm ("Incorrect." + dialogStr)) { return false; } } } if (!matchesV) { addSummary ("Terms indicated in <FONT COLOR='#CC9900'>yellow<\/FONT> do not match."); } else if (summaryStr.length == 0) { summaryStr += '<TR><TD><\/TD><TD><\/TD><TD COLSPAN="3"><FONT SIZE="3" FACE="Helvetica, Arial">Validated.<\/FONT><\/TD><\/TR>'; } displayResult(); return false; }