'; //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]='disadvantages'; I[0][2]=''; I[1] = new Array(); I[1][1] = new Array(); I[1][1][0] = new Array(); I[1][1][0][0]='controlled'; I[1][2]=''; I[2] = new Array(); I[2][1] = new Array(); I[2][1][0] = new Array(); I[2][1][0][0]='reservoir'; I[2][2]=''; I[3] = new Array(); I[3][1] = new Array(); I[3][1][0] = new Array(); I[3][1][0][0]='electricity'; I[3][2]=''; I[4] = new Array(); I[4][1] = new Array(); I[4][1][0] = new Array(); I[4][1][0][0]='Nasser'; I[4][2]=''; I[5] = new Array(); I[5][1] = new Array(); I[5][1][0] = new Array(); I[5][1][0][0]='Nile'; I[5][2]=''; I[6] = new Array(); I[6][1] = new Array(); I[6][1][0] = new Array(); I[6][1][0][0]='floods'; I[6][2]=''; I[7] = new Array(); I[7][1] = new Array(); I[7][1][0] = new Array(); I[7][1][0][0]='delta'; I[7][2]=''; I[8] = new Array(); I[8][1] = new Array(); I[8][1][0] = new Array(); I[8][1][0][0]='Silt'; I[8][2]=''; I[9] = new Array(); I[9][1] = new Array(); I[9][1][0] = new Array(); I[9][1][0][0]='downriver'; I[9][2]=''; I[10] = new Array(); I[10][1] = new Array(); I[10][1][0] = new Array(); I[10][1][0][0]='stocks'; I[10][2]=''; I[11] = new Array(); I[11][1] = new Array(); I[11][1][0] = new Array(); I[11][1][0][0]='Bilharzia'; I[11][2]=''; I[12] = new Array(); I[12][1] = new Array(); I[12][1][0] = new Array(); I[12][1][0][0]='snails'; I[12][2]=''; I[13] = new Array(); I[13][1] = new Array(); I[13][1][0] = new Array(); I[13][1][0][0]='environment'; I[13][2]=''; I[14] = new Array(); I[14][1] = new Array(); I[14][1][0] = new Array(); I[14][1][0][0]='harm'; I[14][2]=''; Text = new Array(); Text[0]='Dams bring advantages and '; Text[1]='. On the plus side, they can allow humans to plan where to have their water supply rather than relying on where nature will put one for them. Dams can allow the exact flow of a river to be '; Text[2]='. This means that it can help to compensate for too much or too little rain. Additionally, the newly created lake or '; Text[3]=' can provide a habitat for wildlife that depend on water. And, dams can also be equipped with turbines to generate '; Text[4]=' with.

It was for these reasons that a huge dam was built in the middle of the Sahara desert by President '; Text[5]=' of Egypt in 1970. Egypt has depended on the flow of the River '; Text[6]=' for thousands of years. By building this new dam, the Egyptian government could control the flow of water and so prevent the '; Text[7]=' or droughts which occurred from time to time. Unfortunately, there were a number of environmental side-effects that have become more and more of a problem as time progresses.

The main problem is that little silt is now being deposited along the banks and in the '; Text[8]=' of the Nile. '; Text[9]=' is soil which is rich in nutrients and minerals and which flows naturally along a river. With the building of the dam, the silt cannot pass the artificial lake created behind the Aswan Dam. This means that the nutritious silt cannot get to the farmers '; Text[10]=' and it also means that the lake itself is filling up with silt. The lack of a natural fertiliser has meant that Egyptian farmers have had to start buying chemical fertilisers to do the job of the silt for them. This has another knock-on effect of meaning that more chemicals are being washed into the River Nile and polluting it. Pollution and the lack of nutrients in the water is also affecting the fish '; Text[11]=' in the river which means that there are fewer and fewer fish to catch.

One other unforeseen environmental impact is the spread of a disease called '; Text[12]='. This is a disease that is spread by water '; Text[13]='. In the past, these were washed along the River Nile and out into the sea. Now, they cannot get past the Aswan Dam. They now spread the disease to the people living around Lake Nasser.

Disrupting the natural flow of water systems can bring benefits to a society, but it can also bring problems. In fact, it can bring many unforeseen problems. It is important that planners try to anticipate the impact that they are going to have on the local '; Text[14]='. Otherwise, they may end up doing more '; Text[15]=' than good. '; 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... '; } //--> //]]> -->