'; //Write it to the frame TopFrame.document.clear(); TopFrame.document.open(); TopFrame.document.write(OutString); TopFrame.document.close(); } function DisplayExercise(){ //Build the output string var OutString = ''; OutString += ''; OutString += ''; OutString += ''; OutString += TitleCode; OutString += ''; OutString += NavBar; OutString += '

'; if (WordBox.length > 0){ OutString += WordBox; } OutString += ''; OutString += BuiltCloze; OutString += '

'; if (is.CRAPBrowser){OutString=ResolveAllURLs(OutString);} //Write it to the frame BottomFrame.document.clear(); BottomFrame.document.open(); BottomFrame.document.write(OutString); BottomFrame.document.close(); } function ShowClue(ItemNum){ //alert(ItemNum); State[ItemNum][0] = 1; WriteFeedback(I[ItemNum][2]); } function SaveCurrentAnswers(){ for (var i=0; i-1){ FirstBit = InString.substring(0, i); LastBit = InString.substring(i + Token.length, InString.length); InString = FirstBit + Replacement + LastBit; i = InString.indexOf(Token); } return InString; } I = new Array(); I[0] = new Array(); I[0][1] = new Array(); I[0][1][0] = new Array(); I[0][1][0][0]='salt'; I[0][2]=''; I[1] = new Array(); I[1][1] = new Array(); I[1][1][0] = new Array(); I[1][1][0][0]='evaporation'; I[1][2]=''; I[2] = new Array(); I[2][1] = new Array(); I[2][1][0] = new Array(); I[2][1][0][0]='drink'; I[2][2]=''; I[3] = new Array(); I[3][1] = new Array(); I[3][1][0] = new Array(); I[3][1][0][0]='agriculture'; I[3][2]=''; I[4] = new Array(); I[4][1] = new Array(); I[4][1][0] = new Array(); I[4][1][0][0]='Irrigation'; I[4][2]=''; I[5] = new Array(); I[5][1] = new Array(); I[5][1][0] = new Array(); I[5][1][0][0]='power'; I[5][2]=''; I[6] = new Array(); I[6][1] = new Array(); I[6][1][0] = new Array(); I[6][1][0][0]='turbines'; I[6][2]=''; I[7] = new Array(); I[7][1] = new Array(); I[7][1][0] = new Array(); I[7][1][0][0]='electricity'; I[7][2]=''; I[8] = new Array(); I[8][1] = new Array(); I[8][1][0] = new Array(); I[8][1][0][0]='Fish'; I[8][2]=''; I[9] = new Array(); I[9][1] = new Array(); I[9][1][0] = new Array(); I[9][1][0][0]='habitat'; I[9][2]=''; I[10] = new Array(); I[10][1] = new Array(); I[10][1][0] = new Array(); I[10][1][0][0]='2.8'; I[10][2]=''; I[11] = new Array(); I[11][1] = new Array(); I[11][1][0] = new Array(); I[11][1][0][0]='ice'; I[11][2]=''; I[12] = new Array(); I[12][1] = new Array(); I[12][1][0] = new Array(); I[12][1][0][0]='groundwater'; I[12][2]=''; I[13] = new Array(); I[13][1] = new Array(); I[13][1][0] = new Array(); I[13][1][0][0]='0.1'; I[13][2]=''; I[14] = new Array(); I[14][1] = new Array(); I[14][1][0] = new Array(); I[14][1][0][0]='polluted'; I[14][2]=''; I[15] = new Array(); I[15][1] = new Array(); I[15][1][0] = new Array(); I[15][1][0][0]='drought'; I[15][2]=''; I[16] = new Array(); I[16][1] = new Array(); I[16][1][0] = new Array(); I[16][1][0][0]='flood'; I[16][2]=''; I[17] = new Array(); I[17][1] = new Array(); I[17][1][0] = new Array(); I[17][1][0][0]='lakes'; I[17][2]=''; I[18] = new Array(); I[18][1] = new Array(); I[18][1][0] = new Array(); I[18][1][0][0]='wells'; I[18][2]=''; I[19] = new Array(); I[19][1] = new Array(); I[19][1][0] = new Array(); I[19][1][0][0]='spring'; I[19][2]=''; I[20] = new Array(); I[20][1] = new Array(); I[20][1][0] = new Array(); I[20][1][0][0]='reservoirs'; I[20][2]=''; Text = new Array(); Text[0]='The water in the sea contains a great deal of '; Text[1]='. This makes it all but unusable for human consumption. Fortunately, the salt is too heavy to be picked up by '; Text[2]='. Therefore, when the rain falls the water is fresh and is able to be used by humans.

Apart from the obvious uses of water as something to '; Text[3]=' and clean with, it can also be used by '; Text[4]=' and industry. '; Text[5]=' systems allow rivers to be used to water fields so that they can grow crops. Industry often uses water as a coolant or as a cleansing agent.

Flowing water can even be used as a source of '; Text[6]='. Hydro-electric dams collect water behind them and then releases that water to run through huge '; Text[7]='. They are effectively giant water wheels. As these wheels turn, they generate '; Text[8]='.

Of course, rivers can also support eco-systems of their own. '; Text[9]=', amphibians, insects and many mammals depend on the flow of fresh water to provide their '; Text[10]=' and source of food. Some humans also depend on these fish stocks for their own livelihoods and as a food source.

Fresh water is surprisingly scarce in the world. Most of the world\'s water is contained in her oceans. But, as has already been pointed out, this is salt water and so of little use to humans. Only '; Text[11]='% of the world\'s total quantity of water is fresh water. Of this, the vast majority of fresh water is stored as '; Text[12]=' or snow. A significant amount of the world\'s water also seeps underground as '; Text[13]='. Only '; Text[14]='% of the world\'s total water stocks flows as surface water in rivers and in lakes.

To make matters worse, this surface water is often '; Text[15]=' by humans. Pesticides and fertilisers used in farming is washed in to the river systems. Factories often pump out dirty water after they have finished using it for cooling or cleaning with.

Nature also affects where the rain falls. Prevailing weather patterns and ecological systems affect the rainfall. There are places in the world that have too much rain and other places that do not have enough. Rainfall also varies from year to year. Some places depend on the amount of rainfall that they receive. If for some reason the same quantity of rain does not fall in a particular year or for a number of years the result can be a severe '; Text[16]='. If there is too much rain the result could be a '; Text[17]='.

So, for a number of reasons, fresh water is a precious commodity. Humans have tried a number of ways of getting access to fresh water. Rivers are the most obvious example but there are other ways too. One way is to take water from '; Text[18]=' through pipelines and aquaducts. Digging '; Text[19]=' is a way of getting access to groundwater. It is also possible for groundwater to be forced out of the ground as a '; Text[20]='. Finally, humans have tried to build their own lakes ('; Text[21]=') to store water through the use of dams. '; State = new Array(); function StartUp(){ var i = 0; State.length = 0; for (i=0; i -1){ var TotalChars = GetGapValue(i).length; State[i][3] = (TotalChars-State[i][1])/TotalChars; if (State[i][0] > 0){State[i][3] = State[i][3]/2;} if (State[i][3]<0){State[i][3] = 0;} State[i][4] = 1; } else{ //Otherwise, add zero to the array and increment the hints for this item, as a penalty State[i][1]++; State[i][3] = 0; //then set the flag AllCorrect = 0; } } } //Calculate the total score var TotalScore = 0; for (i=0; i'; } Output += YourScoreIs + ' ' + TotalScore + '%.
'; if (AllCorrect == 0){ Output += '
' + Incorrect; } BuildExercise(); WriteFeedback(Output); DisplayExercise(); RestoreCurrentAnswers(); } function TrackFocus(BoxNumber){ CurrentWord = BoxNumber; } function CheckBeginning(Guess, Answer){ var OutString = ''; var i = 0; var UpperGuess = ''; var UpperAnswer = ''; if (CaseSensitive == false) { UpperGuess = Guess.toUpperCase(); UpperAnswer = Answer.toUpperCase(); } else { UpperGuess = Guess; UpperAnswer = Answer; } while (UpperGuess.charAt(i) == UpperAnswer.charAt(i)) { OutString += Guess.charAt(i); i++; } OutString += Answer.charAt(i); return OutString; } function FindLongest(InArray){ if (InArray.length < 1){return -1;} var Longest = 0; for (var i=1; i InArray[Longest].length){ Longest = i; } } return Longest; } function GetGapValue(GNum){ var RetVal = ''; if ((GNum<0)||(GNum>=I.length)){return RetVal;} if (eval('BottomFrame.document.Cloze.Gap' + GNum) != null){ RetVal = eval('BottomFrame.document.Cloze.Gap' + GNum).value; RetVal = TrimString(RetVal); } else{ RetVal = State[GNum][5]; } return RetVal; } function SetGapValue(GNum, Val){ if ((GNum<0)||(GNum>=I.length)){return;} if (eval('BottomFrame.document.Cloze.Gap' + GNum) != null){ eval('BottomFrame.document.Cloze.Gap' + GNum).value = Val; } } function FindCurrent() { var x = 0; FoundCurrent = -1; //Test the current word: //If it's state is not set to already correct, check the word. if (State[CurrentWord][4] != 1){ if (CheckAnswer(CurrentWord, false) < 0){ return CurrentWord; } } x=CurrentWord + 1; while (x -1){return ''} RightBits = new Array(); for (var i=0; i 0){ SetGapValue(CurrGap, HintString); State[CurrGap][1] = State[CurrGap][1] + 1; } WriteFeedback(GiveHint); } function Blank(){ return '©Half-Baked Software. Loading... '; } //--> //]]> -->