// Globals var thebgColor = "DDFFDD"; var X = 0; var x = 0; var y = 0; var h = 0; var xh = 0; var hx = 0; var t = 0; var th = 0; var ht = 0; var a = 0; var b = 0; var guesses = 0; var quoteMark = unescape( '%22' ); var singlequoteMark = unescape( '%27' ); // *** Error Handler ****** function myErrorTrap(message,url,linenumber) { this.parent.bottom.window.location = "wrong.html"; return (true); } // end of on error // ******************** function writeHeading(theTitle) { var theText = '
' + theTitle + '
' document.writeln(theText); } function drawLine() { var theText = '
' document.writeln(theText); } function sesame(url,hsize,vsize){ // Default size is 550 x 400 var tb="toolbar=0,directories=0,status=0,menubar=0" tb+=",scrollbars=1,resizable=1," var tbend="width="+hsize+",height="+vsize; if(tbend.indexOf("")!=-1){tbend="width=550,height=400"} tb+=tbend; Win_1 = window.open(url,"win1",tb); Win_1.focus(); } // Bottom Window handlers var theScriptString = ''; function writeBottomWrong(theMessage) { var theString = ""; if (theMessage == "") theString = '' + theScriptString + '
'; else theString = '' + theScriptString + '

' theString += theMessage ; theString += '
'; this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomWrong function writeBottomCorrect() { var theString = '' + theScriptString + '
' this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomCorrect function writeBottomSmile(theMessage,x) { // x = 1 gives one smile (with a space or text as the message) // x = 2 gives another // x = 3 gives a third var theString = ""; if ((theMessage == "")&& (pageLanguage == "en")) theString = '' + theScriptString + '
'; else if ((theMessage == "")&& (pageLanguage == "es")) theString = '' + theScriptString + '
'; else if (x == 2) theString = '' + theScriptString + '

'; else if (x == 3) theString = '' + theScriptString + '

'; else if (x == 4) theString = '' + theScriptString + '

'; else theString = '' + theScriptString + '

' theString += theMessage ; theString += '
'; this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomWrong function writeBottomMmmh(theMessage) { var theString = '' + theScriptString + '

' theString += theMessage ; theString += '
'; this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomMessage function writeBottomMessage(theMessage) { var theString = '' + theScriptString + '
' theString += theMessage ; theString += '
'; this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomMessage function writeBottomYell(theMessage) { var theString = '' + theScriptString + '
' theString += theMessage ; theString += '
'; this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomMessage function writeBottomYell2(theMessage) { var theString = '' + theScriptString + '

' theString += theMessage ; theString += '
'; this.parent.bottom.document.write(theString); this.parent.bottom.document.close(); } // writeBottomMessage // ********* Answer checking routines ********* // the following two routines are can be used in both tutorials and // review exercises to do answer checking and "peeking" // handles both strings and numerical values. // These routines use one or two other string utilities in this file // example of html code that uses this: // //
// // // // function checkAnswer(formName,fieldName,Option,correctAnswer) { // returns true if the answer is correct, else returns false // Option1 compares the string (spaces stripped case insensitive) with the desired string // Option 2 compares a modified string: changes X to x, Y to y, Z to z, // and removes * before comparing // Option 3 evaluates the string // Option 4 checks to see if the string is blank & returns true if blank // Option 5 here is for 5 decimal places accuraqcy var theCommand = ""; var theString = ""; var a1 = eval("theString = stripSpaces(document."+ formName + "." + fieldName + ".value"+")" ); if (theString != "") { if (Option == 1) { var act1 = eval("theString = stripSpaces(document."+ formName + "." + fieldName + ".value"+")" ); if (theString.toLowerCase() == correctAnswer.toLowerCase()) return (true); else return (false); } // Option 1 else if (Option == 2) { var act1 = eval("theString = stripSpaces(document."+ formName + "." + fieldName + ".value"+")" ); theString = replaceChar (theString,"X","x"); theString = replaceChar (theString,"Y","y"); theString = replaceChar (theString,"Z","z"); theString = replaceChar (theString,"A","a"); theString = replaceChar (theString,"B","b"); theString = replaceChar (theString,"C","c"); theString = stripChar(theString,"*"); if (theString == correctAnswer) return (true); else return (false); } // Option 2 else if (Option == 3) { var act1 = eval("theString = document."+ formName + "." + fieldName + ".value" ); // check to see if the string looks is ok for eval if (looksLikeANumber(theString)) { var x = eval(theString); var err = Math.abs(x - correctAnswer); if (err < 0.00005) return (true); else return (false); } else return (false); return(false); } // Option 3 else if (Option == 5) { var act1 = eval("theString = document."+ formName + "." + fieldName + ".value" ); // check to see if the string looks is ok for eval if (looksLikeANumber(theString)) { var x = eval(theString); var err = Math.abs(x - correctAnswer); if (err < 0.000005) return (true); else return (false); } else return (false); return(false); } // Option 5 } // endif non-empty else if (Option == 4) return(true); // in case of empty string } function checkAnswerandValue(formName,fieldName,correctAnswer,minLength, maxLength, maxTolerance, assig1,assig2,assig3, assig4) { // use this to check for simplified expressions // evaluates the input string in the specified form // & returns 1 if the answer is correct (agrees with correctAnswer) // to within 0.00005 and is the right length otherwise set "maxerror" = whatever // as one of the assignments // returns 2 if the answer is right but string too long (unsimplified) // returns 3 if answer is right but string too short // returns 0 if the answer is blank // else returns 6; // it evalutes the input string at sthe specified values // Each assigi has the form "x=2" or "h=2.3" // minLength & maxLength are the permissable ranges of an input string // maxTolerance is the largest possible error // NOTE: requires GLOBAL variables x, h, or whatever is assigned var theString = ""; var maxerror = maxTolerance; var a1 = eval("theString = stripSpaces(document."+ formName + "." + fieldName + ".value"+")" ); theString = theString.toLowerCase(); if (assig1 != "") var b1 = eval(assig1); // set the values equal to numbers if (assig2 != "") var b2 = eval(assig2); if (assig3 != "") var b3 = eval(assig3); if (assig4 != "") var b4 = eval(assig4); if (theString == "") return(0); else { theString = stripChar (theString, "$"); // for dollar signs theString = stripChar (theString, ","); // for longer numbers theString = theString.toLowerCase(); var val = myEval (theString); var correctVal = myEval(correctAnswer); var err = Math.abs(val - correctVal); if (err < maxerror) { if (theString.length > maxLength) return(2); else if (theString.length < minLength) return(3); else return(1); } else return (6); } // endif non-empty } // end checkAnswerandValue function togglePeek(formName,fieldName,expression) { // displays the given expression in formName.fieldname if not already visible // if already visible, it hides it var theCommand = ""; var theString = "if (document." + formName + "." + fieldName + ".value != '" + expression + "') document." + formName + "." + fieldName + ".value = '" + expression + "'; else document." + formName + "." + fieldName + ".value = '';" // alert(theString) var act1 = eval(theString); return(true); } // ************** end of answer handling routines *************