var cellCount = 0;
var cellHistory = new Array();
var colHistory = new Array();
var currentAction = 0;

function leaveCell(cell, col){
  var cellValue = cell+"_"+col;
  var value = col+"_"+cell;

  if(document.getElementById(value).value == 0){
    document.getElementById(cellValue).style.backgroundColor='white';
    document.getElementById(cellValue).style.color='white';
  }
  else{
    document.getElementById(cellValue).style.backgroundColor='green';
    document.getElementById(cellValue).style.color='green';
  }
}

function startCell(cell, col){
    cellCount = 1;
    var cellValue = cell+"_"+col;
    var value = col+"_"+cell;

    if(document.getElementById(value).value == 0){
       currentAction = 1;
      document.getElementById(value).value=1;
      document.getElementById(cellValue).style.backgroundColor='green';
      document.getElementById(cellValue).style.color='green';
    }
    else{
       currentAction = 0;
      document.getElementById(value).value=0;
      document.getElementById(cellValue).style.backgroundColor='white';
      document.getElementById(cellValue).style.color='white';
    }
}

function enterCell(cell, col){
  var cellValue = cell+"_"+col;
  var value = col+"_"+cell;

  if(cellCount >= 1) {
      if(currentAction == 1){
        document.getElementById(value).value=1;
        document.getElementById(cellValue).style.backgroundColor='green';
        document.getElementById(cellValue).style.color='green';
      }
      else{
        document.getElementById(value).value=0;
        document.getElementById(cellValue).style.backgroundColor='white';
        document.getElementById(cellValue).style.color='white';
      }
  }

  document.getElementById(cellValue).style.backgroundColor='#cccccc';
  document.getElementById(cellValue).style.color='#cccccc';
}

function emptyAll(){
    cellCount = 0;
    cellHistory = new Array();
    colHistory = new Array();
  currentAction = 1;      
}



document.onload = function() {
  //document.onselectstart = function() {return false;} // ie
  //document.onmousedown = function() {return false;} // mozilla
}