I am creating an online-canvas-game with a tank as player object,
Now I have several structures in my canvas, that shouldn't be able to be overdriven by the tank...
My solution is to detect the collision like that:

        if(hero.x > reactor[i]['x'] - 32 && hero.x <= reactor[i]['x'] + 32 && hero.y > reactor[i]['y'] - 32 && hero.y <= reactor[i]['y']){
        collidetop = true;
    }

    if(hero.x > reactor[i]['x'] - 32 && hero.x <= reactor[i]['x'] + 32 && hero.y >= reactor[i]['y'] && hero.y < reactor[i]['y'] + 32){
        collidebottom = true;
    }

    if(hero.x > reactor[i]['x'] - 32 && hero.x <= reactor[i]['x'] && hero.y > reactor[i]['y'] - 32 && hero.y <= reactor[i]['y'] + 32){
        collideleft = true;
    }

    if(hero.x > reactor[i]['x'] && hero.x <= reactor[i]['x'] + 32 && hero.y > reactor[i]['y'] - 32 && hero.y <= reactor[i]['y'] + 32){
        collideright = true;
    }  

the hero object is the tank, hero.x the x-coordinate, and so on...
Now I'd like to deactivate the keyboard input for the direction key, if the objects collide...
For this reason I have the variables wok, aok, sok and dok - they all contain booleans.
If wok = false, then the key "w" is deactivated...
I've connected the collidevariables to the keyboardinputs:

if(collidetop == true){
    sok = false;
}
if(collidetop == false){
    sok = true;
}
if(collidebottom == true){
    wok = false;
}
if(collidebottom == false){
    wok = true;
}
if(collideright == true){
    aok = false;
}
if(collideright == false){
    aok = true;
}
if(collideleft == true){
    dok = false;
}
if(collideleft == false){
    dok = true;
}  

My Problem is: if the tank doesn't collide the other object any more, the keys stay blocked... Could you help me with that?

Tried many things, but nothing really worked...

Already now, thank you for your answers ;)

Btw.: Sorry for my particular badly English...

I'm creating an online-canvas-game with a tank as player object.

Now I have several structures in my canvas, that shouldn't be able to be overdriven by the tank...
My solution is to detect the collision like that:

if(hero.x > reactor[i]['x'] - 32 && hero.x <= reactor[i]['x'] + 32
   && hero.y > reactor[i]['y'] - 32 && hero.y <= reactor[i]['y']){
    collidetop = true;
}

if(hero.x > reactor[i]['x'] - 32 && hero.x <= reactor[i]['x'] + 32
   && hero.y >= reactor[i]['y'] && hero.y < reactor[i]['y'] + 32){
    collidebottom = true;
}

if(hero.x > reactor[i]['x'] - 32 && hero.x <= reactor[i]['x']
   && hero.y > reactor[i]['y'] - 32 && hero.y <= reactor[i]['y'] + 32){
    collideleft = true;
}

if(hero.x > reactor[i]['x'] && hero.x <= reactor[i]['x'] + 32
   && hero.y > reactor[i]['y'] - 32 && hero.y <= reactor[i]['y'] + 32){
    collideright = true;
}

The hero object is the tank, hero.x the x-coordinate, and so on...
Now I'd like to deactivate the keyboard input for the direction key, if the objects collide...
For this reason I have the variables wok, aok, sok and dok - they all contain booleans.
If wok = false, then the key "w" is deactivated...
I've connected the collide variables to the keyboard inputs:

if(collidetop == true){
    sok = false;
}
if(collidetop == false){
    sok = true;
}
if(collidebottom == true){
    wok = false;
}
if(collidebottom == false){
    wok = true;
}
if(collideright == true){
    aok = false;
}
if(collideright == false){
    aok = true;
}
if(collideleft == true){
    dok = false;
}
if(collideleft == false){
    dok = true;
} 

My problem is: if the tank doesn't collide the other object any more, the keys stay blocked... Could you help me with that?