// Swap images
function swap(what) {
  if (what.src.indexOf("_on")==-1) {
    var onStatus = "";
    var regex = /_off/g;
    onStatus = what.src.replace(regex,"_on");
  } else {
    var onStatus = "";
    var regex = /_on/g;
    onStatus = what.src.replace(regex,"_off");
  }
  what.src = onStatus;
}
function highLight(t) {
  var lastNr = new String(t.id).charAt(3);
  var firstNrs = new String(t.id).slice(0, 3);
 
  t.className="blue";
  for(i=lastNr - 1; i>-1; i--) {
    eval('document.getElementById("' + firstNrs + i + '").className="yellow"');   
  }
  var secondthirdNr =  new String(t.id).slice(1, 3);
  firstNrs = new String(t.id).slice(0, 1);
  for(i=secondthirdNr -1; i>=0; i--) {
   	if (i<10) { 
      eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="yellow"');   
		} else {
	  	eval('document.getElementById("' + firstNrs + i + lastNr + '").className="yellow"');   
		}
  }
  for(i=Number(secondthirdNr) +1; i<=30; i++) {
   	if (i<10) { 
   		if (document.getElementById(firstNrs + "0" + i + lastNr) != null) {
      	eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="yellow"');   
      }
		} else {
			if (document.getElementById(firstNrs + i + lastNr) != null) {
	  		eval('document.getElementById("' + firstNrs + i + lastNr + '").className="yellow"');   
	  	}
		}
  }
}

function dim(t) {
  var lastNr = new String(t.id).charAt(3);
  var firstNrs = new String(t.id).slice(0, 3);
  t.className="void";
  for(i=lastNr - 1; i>-1; i--) {
    eval('document.getElementById("' + firstNrs + i + '").className="void"');   
  }
  var secondthirdNr =  new String(t.id).slice(1, 3);//new String(t.id).charAt(2);
  firstNrs = new String(t.id).slice(0, 1);
  for(i=secondthirdNr -1; i>=0; i--) {
   	if (i<10) { 
      eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="void"');   
    } else {
      eval('document.getElementById("' + firstNrs + i + lastNr + '").className="void"');   
    }
  }
  for(i=Number(secondthirdNr) +1; i<=40; i++) {
   	if (i<10) { 
   		if (document.getElementById(firstNrs + "0" + i + lastNr) != null) {
      	eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="void"');   
      }
		} else {
			if (document.getElementById(firstNrs + i + lastNr) != null) {
	  		eval('document.getElementById("' + firstNrs + i + lastNr + '").className="void"');   
	  	}
		}
  }
}
function highLight2(t) {
	  var lastNr = new String(t.id).slice(3);
	  var firstNrs = new String(t.id).slice(0, 3);
	 
	  t.className="blue";
	  for(i=lastNr - 1; i>-1; i--) {
		if(i < 10) {
			eval('document.getElementById("' + firstNrs +'0'+ i + '").className="yellow"');   
		}
		else {
			eval('document.getElementById("' + firstNrs + i + '").className="yellow"');   
		}
	    
	  }
	  var secondthirdNr =  new String(t.id).slice(1, 3);
	  firstNrs = new String(t.id).slice(0, 1);
	  for(i=secondthirdNr -1; i>=0; i--) {
	   	if (i<10) { 
	      eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="yellow"');   
			} else {
		  	eval('document.getElementById("' + firstNrs + i + lastNr + '").className="yellow"');   
			}
	  }
	  for(i=Number(secondthirdNr) +1; i<=30; i++) {
	   	if (i<10) { 
	   		if (document.getElementById(firstNrs + "0" + i + lastNr) != null) {
	      	eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="yellow"');   
	      }
			} else {
				if (document.getElementById(firstNrs + i + lastNr) != null) {
		  		eval('document.getElementById("' + firstNrs + i + lastNr + '").className="yellow"');   
		  	}
			}
	  }
	}
function dim2(t) {
	  var lastNr = new String(t.id).slice(3);
	  var firstNrs = new String(t.id).slice(0, 3);
	  t.className="void";
	  for(i=lastNr - 1; i>-1; i--) {
		  if(i < 10) {
			eval('document.getElementById("' + firstNrs +'0'+ i + '").className="void"');   
		  }
		  else {
			  eval('document.getElementById("' + firstNrs + i + '").className="void"');   
		  }
	  }
	  var secondthirdNr =  new String(t.id).slice(1, 3);
	  firstNrs = new String(t.id).slice(0, 1);
	  for(i=secondthirdNr -1; i>=0; i--) {
	   	if (i<10) { 
	      eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="void"');   
	    } else {
	      eval('document.getElementById("' + firstNrs + i + lastNr + '").className="void"');   
	    }
	  }
	  for(i=Number(secondthirdNr) +1; i<=40; i++) {
	   	if (i<10) { 
	   		if (document.getElementById(firstNrs + "0" + i + lastNr) != null) {
	      	eval('document.getElementById("' + firstNrs + "0" + i + lastNr + '").className="void"');   
	      }
			} else {
				if (document.getElementById(firstNrs + i + lastNr) != null) {
		  		eval('document.getElementById("' + firstNrs + i + lastNr + '").className="void"');   
		  	}
			}
	  }
	}