'; //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]='channels'; I[0][2]=''; I[1] = new Array(); I[1][1] = new Array(); I[1][1][0] = new Array(); I[1][1][0][0]='banks'; I[1][2]=''; I[2] = new Array(); I[2][1] = new Array(); I[2][1][0] = new Array(); I[2][1][0][0]='Heavy'; I[2][2]=''; I[3] = new Array(); I[3][1] = new Array(); I[3][1][0] = new Array(); I[3][1][0][0]='time'; I[3][2]=''; I[4] = new Array(); I[4][1] = new Array(); I[4][1][0] = new Array(); I[4][1][0][0]='short'; I[4][2]=''; I[5] = new Array(); I[5][1] = new Array(); I[5][1][0] = new Array(); I[5][1][0][0]='silt'; I[5][2]=''; I[6] = new Array(); I[6][1] = new Array(); I[6][1][0] = new Array(); I[6][1][0][0]='channel'; I[6][2]=''; I[7] = new Array(); I[7][1] = new Array(); I[7][1][0] = new Array(); I[7][1][0][0]='trees'; I[7][2]=''; I[8] = new Array(); I[8][1] = new Array(); I[8][1][0] = new Array(); I[8][1][0][0]='sponge'; I[8][2]=''; I[9] = new Array(); I[9][1] = new Array(); I[9][1][0] = new Array(); I[9][1][0][0]='roots'; I[9][2]=''; I[10] = new Array(); I[10][1] = new Array(); I[10][1][0] = new Array(); I[10][1][0][0]='hard'; I[10][2]=''; I[11] = new Array(); I[11][1] = new Array(); I[11][1][0] = new Array(); I[11][1][0][0]='groundwater'; I[11][2]=''; I[12] = new Array(); I[12][1] = new Array(); I[12][1][0] = new Array(); I[12][1][0][0]='marshlands'; I[12][2]=''; I[13] = new Array(); I[13][1] = new Array(); I[13][1][0] = new Array(); I[13][1][0][0]='Dams'; I[13][2]=''; I[14] = new Array(); I[14][1] = new Array(); I[14][1][0] = new Array(); I[14][1][0][0]='expensive'; I[14][2]=''; I[15] = new Array(); I[15][1] = new Array(); I[15][1][0] = new Array(); I[15][1][0][0]='homes'; I[15][2]=''; Text = new Array(); Text[0]='Floods occur when the '; Text[1]=' that water use are overwhelmed. Rivers break their '; Text[2]=' and the water spreads out into the surrounding areas. Floods can be due to either natural reasons or to man-made ones (or probably a combination of both).

'; Text[3]=' rainfall is the most obvious cause of floods. Existing river channels can only carry a certain amount of water, they need '; Text[4]=' to be able to carry water away to the sea. If there is a particularly heavy rainfall, or a series of heavy rains in a '; Text[5]=' period of time, the banks of the rivers can burst and cause flooding to the surrounding countryside.

Existing rivers can also flood if they '; Text[6]=' up. This means that soil has been washed down the river and collects in a '; Text[7]=' somewhere along the course of the river. If too much soil collects in this channel, the water is displaced into the surrounding countryside. Although, this is often after a heavy rainfall somewhere up the river system.

Vegetation (particularly '; Text[8]=') can act as a natural '; Text[9]=' to soak up excess water or to at least slow its flow. All plants require water and will try to hold on to as much of it as they can. Their leaves and '; Text[10]=' will all try to catch water. They will also act as a brake. The leaves will stop the water from hitting the ground too '; Text[11]='. This will mean that it is more difficult for top soil to be washed away as silt. Roots will slow down the flow of '; Text[12]=' and so will give the river systems more time to carry away the existing surface water. Reeds and grasses in '; Text[13]=' and swamps do a similar job. If the trees and vegetation are removed at all, the likelihood of a flood down river will increase greatly.

'; Text[14]=' are a man-made way of trying to prevent flooding. However, we have already seen that these can also affect the environmental system in other unforeseen ways. Besides, they are very '; Text[15]=' and time-consuming to build. They can also be politically unpopular as they force some people off their land and out of their '; Text[16]='.'; 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... '; } //--> //]]> -->