// JavaScript Document
function trim(inputString) {
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.
   if (typeof inputString != "string") { return inputString; }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings
   }
  // alert(retValue);
   return retValue; // Return the trimmed string back to the user
}
var cnt = 0;
var arr_uebung_01 = new Array(
                              "den",
                              "dem",
                              "die",
                              "der",
                              "die",
                              "der",
                              "der",
                              "den",
                              "die",
                              "dem"
                             );

function Ergebnis_uebung_01(){
	cnt = 0;
	//alert(cnt +arr_uebung_01.length );
	for(i = 0,cnt=1;i<arr_uebung_01.length;i++){
		 var txtVal = document.getElementById(cnt).value;
		 var txtTrimedString = trim(txtVal);
		// alert(arr_uebung_01[i] + txtTrimedString)
		 if(arr_uebung_01[i] == txtTrimedString)
		   document.getElementById(cnt).style.backgroundColor = "#66FF33";
		 else
		   document.getElementById(cnt).style.backgroundColor = "#ff0033";
		   cnt = cnt + 1;
	}
	
}
function Loesung_uebung_01(){
	
	for(i = 0,cnt=1;i<arr_uebung_01.length;i++){
		//alert('i :- '+i+'\ncnt :- '+cnt);
		if((document.getElementById(cnt).style.backgroundColor == 'rgb(255, 0, 51)'||document.getElementById(cnt).style.backgroundColor == '')||document.getElementById(cnt).style.backgroundColor == '#ff0033'||document.getElementById(cnt).style.backgroundColor == '' ){
  			 document.getElementById(cnt).value = arr_uebung_01[i];
			 document.getElementById(cnt).style.backgroundColor = "#CCCCCC";
		}
		 cnt = cnt + 1;
	}
	cnt = 0;
}
var arr_uebung_02 = new Array(
"Der","Mann,","der","große","finanzielle","Schwierigkeiten","hat,","hat","das","Geld","gestohlen.",
"Die","Studentin,","die","heute","ihren","Geburtstag","feiert,","wohnt","erst","seit","kurzem","im","Wohnheim.",
"Ein","Passant","hat","dem","Kind","geholfen,","das","von","einem","großen","Hund","angegriffen","wurde.",
"Die","Touristen,","die","ihr","Geld","zurückverlangten,","waren","mit","dem","Service","äußerst","unzufrieden.",
"Die","Fotos,","die","man","mit","einer","Canon","gemacht","hat,","sind","von","sehr","guter","Qualität.",
"Unsere","Aushilfe,","in","die","unser","Abteilungsleiter","sich","verliebt","hat,","ist","sehr","hübsch.",
"Die","Kinder,","mit","denen","unser","Sohn","öfters","Fußball","spielt,","wohnen","am","Ostpark.",
"Unsere","Großmutter,","für","die","wir","schon","seit","Jahren","sorgen,","ist","schwer","erkrankt.",
"Das","ist","der","alte","Herr","aus","Dülmen,","an","den","Sie","sich","nicht","mehr","erinnern","können.",
"Die","Prüfung,","auf","die","wir","uns","wochenlang","vorbereiten","müssen,","ist","sehr","schwer."
                              );

function Ergebnis_uebung_02(){
	cnt = 0;
	for(i = 0,cnt=11;i<arr_uebung_02.length;i++){
		 var txtVal = document.getElementById(cnt).value;
		 
		 var txtTrimedString = trim(txtVal);
		// alert(arr_uebung_02[i] + txtTrimedString)
		 if(arr_uebung_02[i] == txtTrimedString)
		   document.getElementById(cnt).style.backgroundColor = "#66FF33";
		 else
		   document.getElementById(cnt).style.backgroundColor = "#ff0033";
		   cnt = cnt + 1;
	}
}
function Loesung_uebung_02(){
	
	cnt = 0;
	
	for(i = 0,cnt=11;i<arr_uebung_02.length;i++){
		//alert(document.getElementById(cnt).style.backgroundColor);
         if((document.getElementById(cnt).style.backgroundColor == 'rgb(255, 0, 51)'||document.getElementById(cnt).style.backgroundColor == '')||document.getElementById(cnt).style.backgroundColor == '#ff0033'||document.getElementById(cnt).style.backgroundColor == '' ){
  		     document.getElementById(cnt).value = arr_uebung_02[i];
			 document.getElementById(cnt).style.backgroundColor = "#CCCCCC";
		 }
		 cnt = cnt + 1;
	}
}
var arr_uebung_03 = new Array(
"Ist","das","der","Mann,","mit","dessen","Hund","unsere","Kinder","gespielt","haben?",
"Ist","das","der","Mann,","in","dessen","Haus","neulich","eingebrochen","wurde?",
"Ist","das","der","Mann,","in","dessen","jüngere","Schwester","unser","Sohn","verliebt","ist?",
"Ist","das","der","Mann,","dessen","Schwester","im","Lotto","gewonnen","hat?",
"Ist","das","die","Frau,","deren","Hund","ein","Kind","gebissen","hat?",
"Ist","das","die","Frau,","deren","Auto","gestohlen","worden","ist?",
"Ist","das","die","Frau,","auf","deren","Mann","man","stets","warten","muss?",
"Ist","das","die","Frau,","der","die","Bilder","des","Museums","gehören?",
"Sind","das","die","Leute,","um","deren","Kinder","man","sich","kümmern","sollte?",
"Sind","das","die","Leute,","mit","denen","niemand","etwas","zu","tun","haben","will?"
                          );

function Ergebnis_uebung_03(){
	cnt = 0;
	for(i = 0,cnt=137;i<arr_uebung_03.length;i++){
		 var txtVal = document.getElementById(cnt).value;
		 
		 var txtTrimedString = trim(txtVal);
		// alert(arr_uebung_03[i] + txtTrimedString)
		 if(arr_uebung_03[i] == txtTrimedString)
		   document.getElementById(cnt).style.backgroundColor = "#66FF33";
		 else
		   document.getElementById(cnt).style.backgroundColor = "#ff0033";
		   cnt = cnt + 1;
	}
}
function Loesung_uebung_03(){
	
	cnt = 0;
	
	for(i = 0,cnt=137;i<arr_uebung_03.length;i++){
		//alert(document.getElementById(cnt).style.backgroundColor);
         if((document.getElementById(cnt).style.backgroundColor == 'rgb(255, 0, 51)'||document.getElementById(cnt).style.backgroundColor == '')||document.getElementById(cnt).style.backgroundColor == '#ff0033'||document.getElementById(cnt).style.backgroundColor == '' ){
  		     document.getElementById(cnt).value = arr_uebung_03[i];
			 document.getElementById(cnt).style.backgroundColor = "#CCCCCC";
		 }
		 cnt = cnt + 1;
	}
}