<!--
//test the browser versions so early versions won't display

           bName = navigator.appName;
           bVer = parseInt(navigator.appVersion);
           if ((bName == "Netscape" && bVer >= 3) ||
           (bName == "Microsoft Internet Explorer" &&
           bVer >= 4)) br = "n3";
           else br = "n2";

// Create image objects and preload all active and inactive images.
           if (br== "n3") {
		   
		   // choices for A
           img50_1on         	= new Image();
		   img50_1on.src    = "../basics/images/quizAluminum_on.gif";
		   img50_1off        	 = new Image();
		   img50_1off.src    = "../basics/images/quizAluminum_off.gif";
		   
		   img50_2on         	= new Image();
		   img50_2on.src    = "../basics/images/quiz30Years_on.gif";
		   img50_2off        	 = new Image();
		   img50_2off.src    = "../basics/images/quiz30Years_off.gif";
		   
		   img50_3on         	= new Image();
		   img50_3on.src    = "../basics/images/quizTrue_on.gif";
		   img50_3off        	 = new Image();
		   img50_3off.src    = "../basics/images/quizTrue_off.gif";
		   
		   img50_4on         	= new Image();
		   img50_4on.src    = "../basics/images/quizA37_on.gif";
		   img50_4off        	 = new Image();
		   img50_4off.src    = "../basics/images/quizA37_off.gif";
		   
		   img50_5off        	= new Image();
		   img50_5off.src    = "../basics/images/quizPos1Blank.gif";
		   
		   img50Thanks		= new Image();
		   img50Thanks.src	="../basics/images/quizThanksB1.gif";
		   
		   // choices for B
		   img51_1on         	= new Image();
		   img51_1on.src    = "../basics/images/quizGlass_on.gif";
		   img51_1off        	 = new Image();
		   img51_1off.src    = "../basics/images/quizGlass_off.gif";
		   
		   img51_2on         	= new Image();
		   img51_2on.src    = "../basics/images/quiz40Years_on.gif";
		   img51_2off        	 = new Image();
		   img51_2off.src    = "../basics/images/quiz40Years_off.gif";
		   
		   img51_3on         	= new Image();
		   img51_3on.src    = "../basics/images/quizFalse_on.gif";
		   img51_3off        	 = new Image();
		   img51_3off.src    = "../basics/images/quizFalse_off.gif";
		   
		   img51_4on         	= new Image();
		   img51_4on.src    = "../basics/images/quizB42_on.gif";
		   img51_4off        	 = new Image();
		   img51_4off.src    = "../basics/images/quizB42_off.gif";
		   
		   img51_5off        	= new Image();
		   img51_5off.src    = "../basics/images/quizPos2Blank.gif";
		   
		   img51Thanks		= new Image();
		   img51Thanks.src	="../basics/images/quizThanksB2.gif";
		   
		   // choices for C
		   img52_1on         	= new Image();
		   img52_1on.src    = "../basics/images/quizNewspaper_on.gif";
		   img52_1off        	 = new Image();
		   img52_1off.src    = "../basics/images/quizNewspaper_off.gif";
		   
		   img52_2on         	= new Image();
		   img52_2on.src    = "../basics/images/quiz50Years_on.gif";
		   img52_2off        	 = new Image();
		   img52_2off.src    = "../basics/images/quiz50Years_off.gif";
		   
		   img52_3on         	= new Image();
		   img52_3on.src    = "../basics/images/quizPos3Blank.gif";
		   img52_3off        	 = new Image();
		   img52_3off.src    = "../basics/images/quizPos3Blank.gif";
		   
		   img52_4on         	= new Image();
		   img52_4on.src    = "../basics/images/quizC27_on.gif";
		   img52_4off        	 = new Image();
		   img52_4off.src    = "../basics/images/quizC27_off.gif";
		   
		   img52_5off        	= new Image();
		   img52_5off.src    = "../basics/images/quizPos3Blank.gif";
		   
		   img52Thanks		= new Image();
		   img52Thanks.src	="../basics/images/quizThanksB3.gif";
		   
		   // choices for D
		   img53_1on         	= new Image();
		   img53_1on.src    = "../basics/images/quizLeadAcid_on.gif";
		   img53_1off        	 = new Image();
		   img53_1off.src    = "../basics/images/quizLeadAcid_off.gif";
		   
		   img53_2on         	= new Image();
		   img53_2on.src    = "../basics/images/quiz70Years_on.gif";
		   img53_2off        	 = new Image();
		   img53_2off.src    = "../basics/images/quiz70Years_off.gif";
		   
		   img53_3on         	= new Image();
		   img53_3on.src    = "../basics/images/quizPos4Blank.gif";
		   img53_3off        	 = new Image();
		   img53_3off.src    = "../basics/images/quizPos4Blank.gif";
		   
		   img53_4on         	= new Image();
		   img53_4on.src    = "../basics/images/quizD50_on.gif";
		   img53_4off        	 = new Image();
		   img53_4off.src    = "../basics/images/quizD50_off.gif";
		   
		   img53_5off        	= new Image();
		   img53_5off.src    = "../basics/images/quizPos4Blank.gif";
		   
		   img53Thanks		= new Image();
		   img53Thanks.src	="../basics/images/quizThanksB4.gif";
		   
		  
		   // letter A image
		   img64A           =  new Image();
		   img64A.src       = "../basics/images/quizA.gif";
		   img64Blk			= new Image();
		   img64Blk.src		="../basics/images/quizABlank.gif";
		   
		   // letter Q image
		   img66Q			= new Image();
		   img66Q.src		="../basics/images/quizQ.gif";
		   img66Thanks	= new Image();
		   img66Thanks.src	="../basics/images/quizThanksA1.gif";
		   
		   
		   // answers blank
		   img65Blk			= new Image();
		   img65Blk.src	="../basics/images/quizQuestionAnswersBlank.gif";
		   
		   // answers to question 1
		   img65_1a		   = new Image();
		   img65_1a.src      = "../basics/images/quizQuestion1_a.gif";
		   img65_1b          = new Image();
		   img65_1b.src      = "../basics/images/quizQuestion1_b.gif";
		   img65_1c          = new Image();
		   img65_1c.src      = "../basics/images/quizQuestion1_c.gif";
		   img65_1d          = new Image();
		   img65_1d.src      = "../basics/images/quizQuestion1_d.gif";
		   
		   // answers to question 2
		   img65_2a			= new Image();
		   img65_2a.src		="../basics/images/quizQuestion2_a.gif";
		   img65_2b			= new Image();
		   img65_2b.src		="../basics/images/quizQuestion2_b.gif";
		   img65_2c			= new Image();
		   img65_2c.src		="../basics/images/quizQuestion2_c.gif";
		   img65_2d			= new Image();
		   img65_2d.src		="../basics/images/quizQuestion2_d.gif";
		   
		   // answers to question 3
		   img65_3a			= new Image();
		   img65_3a.src		="../basics/images/quizQuestion3_false.gif";
		   img65_3b			= new Image();
		   img65_3b.src		="../basics/images/quizQuestion3_true.gif";
		   
		   // answers to question 4
		   img65_4a		   = new Image();
		   img65_4a.src      = "../basics/images/quizQuestion4_a.gif";
		   img65_4b		   = new Image();
		   img65_4b.src      = "../basics/images/quizQuestion4_d.gif";
		   img65_4c		   = new Image();
		   img65_4c.src      = "../basics/images/quizQuestion4_c.gif";
		   img65_4d		   = new Image();
		   img65_4d.src      = "../basics/images/quizQuestion4_d.gif";
		   
		   // the questions themselves
		   img69_1				= new Image();
		   img69_1.src			="../basics/images/quizQuestion1.gif";
		   img69_2			= new Image();
		   img69_2.src			="../basics/images/quizQuestion2.gif";
		   img69_3				= new Image();
		   img69_3.src			="../basics/images/quizQuestion3.gif";
		   img69_4				= new Image();
		   img69_4.src			="../basics/images/quizQuestion4.gif";
		   img69_5				= new Image();
		   img69_5.src			="../basics/images/quizQuestionBlank.gif";
		   img69Thanks		= new Image();
		   img69Thanks.src	="../basics/images/quizThanksA2.gif";
		   
		   
		   // next question image
		   img70nq				= new Image();
		   img70nq.src			="../basics/images/quizTitleNext.gif";
		   img70n				= new Image();
		   img70n.src			="../basics/images/quizTitleNext2.gif";
		   img70Blk				= new Image();
		   img70Blk.src			="../basics/images/quizTitleRight.gif";
		   
           }

// Exchange the question image
			var h = 1
			function newQuestion(imgName) {
				if ((h < 6) && (document.images["img70"].src == eval("img70n.src"))) {
					if (document.images[imgName].src == eval(imgName + "_" + h + ".src")) {
						document.images[imgName].src = eval(imgName + "_" + (h+1) + ".src");
						for (i=50; i<54; ++i) {
							document.images[eval('"img" + i')].src = eval("img" + i + "_" + (h+1) + "off.src");
							}
						for (j=64; j<66; ++j) {
							document.images[eval('"img" + j')].src = eval("img" + j + "Blk.src");
							}
						}
						
					if (document.images[imgName].src == eval(imgName+"_5.src")) {
						  document.images[imgName].src = eval(imgName+"Thanks.src");
						  document.images["img70"].src	   = eval("img70"+"Blk.src");
						  document.images["img66"].src	   = eval("img66"+"Thanks.src");
						  document.images["img64"].src	 = eval("img64"+"Blk.src");
						  document.images["img65"].src	 = eval("img65"+"Blk.src");
						  for (k=50; k<54; ++k) {
							document.images[eval('"img" + k')].src = eval("img" + k + "Thanks.src");
							}
						  }
			h = (h + 1);
				}
			}

				
				
// Insert correct answer image
		// answers for the "A" choices
			function imgCorrectA(imgName) {
			if (br== "n3") {
			if (document.images["img69"].src != eval("img69Thanks.src")) {
			document.images["img70"].src = eval("img70"+"n.src");
			document.images["img64"].src = eval("img64"+"A.src");
				}
				if (document.images["img69"].src == eval("img69"+"_1.src")) 
					document.images[imgName].src = eval(imgName+"_1a.src");
					
				else if (document.images["img69"].src == eval("img69"+"_2.src"))
						  document.images[imgName].src = eval(imgName+"_2a.src");
						 
				else if (document.images["img69"].src == eval("img69"+"_3.src")) 
						  document.images[imgName].src = eval(imgName+"_3b.src");
						
				else if (document.images["img69"].src == eval("img69"+"_4.src"))
						  document.images[imgName].src = eval(imgName+"_4a.src");
				}		  
			   }
			
		// answers for the "B" choices	
			function imgCorrectB(imgName) {
			if (br== "n3") {
			if (document.images["img69"].src != eval("img69Thanks.src")) {
			document.images["img70"].src = eval("img70"+"n.src");
			document.images["img64"].src = eval("img64"+"A.src");
			}
			   if (document.images["img69"].src == eval("img69"+"_1.src")) {
					document.images[imgName].src = eval(imgName+"_1b.src");
					}
				else if (document.images["img69"].src == eval("img69"+"_2.src")) {
						  document.images[imgName].src = eval(imgName+"_2b.src");
						  }
				else if (document.images["img69"].src == eval("img69"+"_3.src")) {
						  document.images[imgName].src = eval(imgName+"_3a.src");
						  }
				else if (document.images["img69"].src == eval("img69"+"_4.src")) {
						  document.images[imgName].src = eval(imgName+"_4b.src");
						  }
				
			   }
			}
			
		// answers for the "C" choices
			function imgCorrectC(imgName) {
			if (br== "n3") {
			if (document.images["img69"].src != eval("img69Thanks.src")) {
			document.images["img70"].src = eval("img70"+"n.src");
			document.images["img64"].src = eval("img64"+"A.src");
			}
			   if (document.images["img69"].src == eval("img69"+"_1.src")) {
					document.images[imgName].src = eval(imgName+"_1c.src");
					}
				else if (document.images["img69"].src == eval("img69"+"_2.src")) {
						  document.images[imgName].src = eval(imgName+"_2c.src");
				      }
				else if (document.images["img69"].src == eval("img69"+"_4.src")) {
						  document.images[imgName].src = eval(imgName+"_4c.src");
				      }
				
			   }
			}
			
		// answers for the "D" choices
			function imgCorrectD(imgName) {
			if (br== "n3") {
			if (document.images["img69"].src != eval("img69Thanks.src")) {
			document.images["img70"].src = eval("img70"+"n.src");
			document.images["img64"].src = eval("img64"+"A.src");
			}
			   if (document.images["img69"].src == eval("img69"+"_1.src")) 
					document.images[imgName].src = eval(imgName+"_1d.src");
					
				else if (document.images["img69"].src == eval("img69"+"_2.src")) 
						  document.images[imgName].src = eval(imgName+"_2d.src");
						  
				else if (document.images["img69"].src == eval("img69"+"_4.src")) 
						  document.images[imgName].src = eval(imgName+"_4d.src");
						  
			   }
			}
			
				
// Replace the off image with the on image
           function imgOn2(imgName) {
           if (br== "n3") {
			if (document.images["img69"].src == eval("img69_1.src")) {
                document.images[imgName].src = eval(imgName+"_1on.src");
                }
            else if (document.images["img69"].src == eval("img69_2.src")) {
					  document.images[imgName].src = eval(imgName+"_2on.src");
					  }
			else if (document.images["img69"].src == eval("img69_3.src")) {
					  document.images[imgName].src = eval(imgName+"_3on.src");
					  }
			else if (document.images["img69"].src == eval("img69_4.src")) {
					  document.images[imgName].src = eval(imgName+"_4on.src");
					  }
			}
           }

// Replace the on image with the off image
           function imgOff2(imgName) {
           if (br== "n3") {
              if (document.images["img69"].src == eval("img69_1.src")) {
                document[imgName].src = eval(imgName+"_1off.src");
                }
            else if (document.images["img69"].src == eval("img69_2.src")) {
					  document[imgName].src = eval(imgName+"_2off.src");
					  }
			else if (document.images["img69"].src == eval("img69_3.src")) {
					  document[imgName].src = eval(imgName+"_3off.src");
					  }
			else if (document.images["img69"].src == eval("img69_4.src")) {
					  document[imgName].src = eval(imgName+"_4off.src");
					  }
				}
              }
//  -->