// 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(
                               "-","er","er","en",
                               "e","e","em","en",
                               "e","e","e","en",
                               "-","er","e","en",
                               "-","es","em","en",
                               "-","er","em","en",
                               "-","es","en","en",
                               "e","e","-","es",
                               "e","e","e","e",
                               "-","er","er","en"
                             );

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(
"Nein,","das","ist","kein","helles","Zimmer.","Das","ist","ein","dunkles","Zimmer.",
"Nein,","das","ist","kein","billiger","Tisch.","Das","ist","ein","teurer","Tisch.",
"Nein,","das","ist","kein","interessanter","Film.","Das","ist","ein","langweiliger","Film.",
"Nein,","das","sind","keine","faulen","Arbeiter.","Das","sind","fleißige","Arbeiter.",
"Nein,","das","sind","keine","guten","Ergebnisse.","Das","sind","schlechte","Ergebnisse.",
"Nein,","das","ist","kein","kurzes","Brett.","Das","ist","ein","langes","Brett.",
"Nein,","das","ist","kein","sauberes","Geschirr.","Das","ist","schmutziges","Geschirr.",
"Nein,","das","sind","keine","lauten","Papageien.","Das","sind","leise","Papageien.",
"Nein,","das","ist","kein","ängstlicher","Junge.","Das","ist","ein","mutiger","Junge.",
"Nein,","das","ist","kein","warmes","Wasser.","Das","ist","kaltes","Wasser."
                              );

function Ergebnis_uebung_02(){
	cnt = 0;
	for(i = 0,cnt=41;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=41;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(
"Eine","aufmerksame","Verkäuferin","erwischt","einen","unvorsichtigen","Dieb","beim","Stehlen.",
"Eine","ängstliche","Katze","muss","vor","einem","großen","Hund","fliehen.",
"Ein","eitler","Herr","lügt","manchmal","seine","eigene","Mutter","an.",
"Man","soll","einem","fremden","Mann","niemals","sein","gespartes","Geld","anvertrauen.",
"Ein","unerfahrener","Frisör","schneidet","einem","jungen","Mädchen","seine","langen","Haare","ab.",
"Ein","hilfsbereiter","Nachbar","fährt","meinen","kranken","Schwiegersohn","ins","Krankenhaus.",
"Ihr","schüchterner","Sohn","geht","heute","Abend","mit","meiner","volljährigen","Tochter","tanzen.",
"Unser","altmodischer","Vater","ist","auf","unseren","älteren","Bruder","wütend.",
"Meine","kritische","Nachbarin","ist","mit","der","geleisteten","Arbeit","sehr","unzufrieden.",
"Ein","lustloser","Arbeiter","muss","heute","einen","hohen","Baum","fällen."
                          );

function Ergebnis_uebung_03(){
	cnt = 0;
	for(i = 0,cnt=146;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=146;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;
	}
}