var toolbarColors = ["", "yellow","blue","red","green", "crimson", "emerald", "aqua", "orange", "purple"]; var toolbarColorRGBs = ["", "yellow","blue","red","green", "crimson", "emerald", "35F3C3", "orange", "purple"]; var buttonoff = new Image(); var button = new Image(); var buttonsel = new Image(); function turnOnButton(idName) { var newImage = "url(" + buttonsel.src + ")"; document.getElementById(idName).style.backgroundImage = newImage; } function turnOffButton(idName) { var newImage = "url(" + buttonoff.src + ")"; if (idName == 'Current') newImage = "url(" + button.src + ")"; document.getElementById(idName).style.backgroundImage = newImage; } var quoteMark = unescape( '%22' ); var singlequoteMark = unescape( '%27' ); var bookTag = ""; function writeMailtag(theSubject) { var theAddress = "mailto:stefman2@optonline.net?Subject="+theSubject; var theTag = "Webmaster"; document.writeln(theTag); } // writeMailtag function drawLine(theColorIndex) { var theColor = toolbarColorRGBs [theColorIndex]; var theStr = '

'; document.writeln(theStr); } // drawLine function writeToolbar(number, theColorIndex, folderDepth) { // number = which tag is active // theColorIndex = index in toolbarColors // folderDepth = 0 if not in folder, 1 if in folder, etc var theColor = toolbarColors [theColorIndex]; // this is global for some readopn var buttonoffsrcString = "nwelts/" + theColor + "buttonoff.gif"; var buttonsrcString = "nwelts/" + theColor + "button.gif"; var buttonselsrcString = "nwelts/" + theColor + "buttonsel.gif"; var theIdentities = ["", "Other0", "Other1","Other2","Other3", "Other4", "Other5", "Other6"]; theIdentities[number] = "Current"; var theMainPages = ['', 'index.html', 'tcfinitep.html', 'tccalcp.html', 'tccombop.html', 'summaryindex.html', 'tutindex.html', 'utilsindex.html']; theMainPages[number] = '#'; var buttonFolderStr = "nwelts"; if (folderDepth > 0) { for (var i = 1; i <= folderDepth; i++) { buttonoffsrcString = "../" + buttonoffsrcString; buttonsrcString = "../" + buttonsrcString; buttonselsrcString = "../" + buttonselsrcString; buttonFolderStr = "../" + buttonFolderStr; for (var j = 1; j <= 7; j++) { theMainPages[j] = "../" + theMainPages[j]; } // j } // i } // if in a folder buttonoff.src = buttonoffsrcString; button.src = buttonsrcString; buttonsel.src = buttonselsrcString; var theBrokenLineStr = "

"; for (var i = 1; i <= number-1; i++) { theBrokenLineStr += "

"; }// i if(number > 0) theBrokenLineStr += "

"; for (var i = number+1; i <= 7; i++) { theBrokenLineStr += "

"; if (i < 7) theBrokenLineStr += "

"; }// i theBrokenLineStr += "

"; var theToolBarString = ""; document.write(theToolBarString); } // writeToolbar var formatTable = '

Some Examples:
Expression

Format (spaces are ignored)

2x - 4

2*x-4 or 2x-4

3²

3^2 or pow(3,2)

3x² + 4x - 5

3*x^2+4*x-5 or 3x^2+4x-5

3,000e^2x-1

3000*e^(2*x-1) or 3000*exp(2x-1)

2x - 1

3x² - 4x

(2x-1)/(3x^2-4x)

|2x - e^x|

abs(2x-exp(x)) or abs(2x-e^x)

2x+1

(2x+1)^0.5 or sqrt(2x+1)

ln | 4x³-5x | + log(10^x

)

ln(abs(4x^3-5x))+log(10^x)

sin(πx - 4)

sin(pi*x-4) NOT sin(pix-4)

'; // *** Error Handler ****** function myErrorTrap(message,url,linenumber) { this.parent.bottom.window.location = "wrong.html"; return (true); } // end of on error // ******************** 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(); }