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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div class="container header">
	<div class="row">
		<div id="messageArea">Battleship</div>
		<div class="input-group input-group-lg">
			<input type="text" class="form-control" id="guessInput" placeholder="Enter a letter and number (ex. A1)">
			<span class="input-group-btn">
        <button class="btn btn-default" type="button" id="fireButton">Fire!</button>
      </span>
		</div>
	</div>
</div>
<div class="container-fluid">
	<div class="row title">
		<div class="col-xs-1 col-sm-2"></div>
		<div class="col-xs-1 col-sm-2"></div>
		<div class="col-xs-1 col-sm-2"></div>
		<div class="col-xs-1 col-sm-2"></div>
		<div class="col-xs-1 col-sm-2"></div>
		<div class="col-xs-1 col-sm-2"></div>
	</div>
	<div class="row one">
		<div class="col-xs-1 col-sm-2" id="01">A1</div>
		<div class="col-xs-1 col-sm-2" id="02">B1</div>
		<div class="col-xs-1 col-sm-2" id="03">C1</div>
		<div class="col-xs-1 col-sm-2" id="04">D1</div>
		<div class="col-xs-1 col-sm-2" id="05">E1</div>
		<div class="col-xs-1 col-sm-2" id="06">F1</div>
	</div>
	<div class="row two">
		<div class="col-xs-1 col-sm-2" id="11">A2</div>
		<div class="col-xs-1 col-sm-2" id="12">B2</div>
		<div class="col-xs-1 col-sm-2" id="13">C2</div>
		<div class="col-xs-1 col-sm-2" id="14">D2</div>
		<div class="col-xs-1 col-sm-2" id="15">E2</div>
		<div class="col-xs-1 col-sm-2" id="16">F2</div>
	</div>
	<div class="row three">
		<div class="col-xs-1 col-sm-2" id="21">A3</div>
		<div class="col-xs-1 col-sm-2" id="22">B3</div>
		<div class="col-xs-1 col-sm-2" id="23">C3</div>
		<div class="col-xs-1 col-sm-2" id="24">D3</div>
		<div class="col-xs-1 col-sm-2" id="25">E3</div>
		<div class="col-xs-1 col-sm-2" id="26">F3</div>
	</div>
	<div class="row four">
		<div class="col-xs-1 col-sm-2" id="31">A4</div>
		<div class="col-xs-1 col-sm-2" id="32">B4</div>
		<div class="col-xs-1 col-sm-2" id="33">C4</div>
		<div class="col-xs-1 col-sm-2" id="34">D4</div>
		<div class="col-xs-1 col-sm-2" id="35">E4</div>
		<div class="col-xs-1 col-sm-2" id="36">F4</div>
	</div>
	<div class="row five">
		<div class="col-xs-1 col-sm-2" id="41">A5</div>
		<div class="col-xs-1 col-sm-2" id="42">B5</div>
		<div class="col-xs-1 col-sm-2" id="43">C5</div>
		<div class="col-xs-1 col-sm-2" id="44">D5</div>
		<div class="col-xs-1 col-sm-2" id="45">E5</div>
		<div class="col-xs-1 col-sm-2" id="46">F5</div>
	</div>
	<div class="row six">
		<div class="col-xs-1 col-sm-2" id="51">A6</div>
		<div class="col-xs-1 col-sm-2" id="52">B6</div>
		<div class="col-xs-1 col-sm-2" id="53">C6</div>
		<div class="col-xs-1 col-sm-2" id="54">D6</div>
		<div class="col-xs-1 col-sm-2" id="55">E6</div>
		<div class="col-xs-1 col-sm-2" id="56">F6</div>
	</div>
</div>
<h1 id="output">test</h1>
            
          
!

CSS

            
              @import "compass";
$green: rgb(83, 175, 19);
$grey: rgba(#929292, .25);
body {
	background: #000;
}

h1{
	color: black;
	text-align: center;
}

.header {
	margin-bottom: 15px;
}

.form-control,
input {
	background: transparent;
	border: $green;
	box-shadow: 0 0 2px $green;
	&:focus {
		box-shadow: 0 0 2px $green;
	}
}

button {
	background-color: $green;
	color: #000;
	&:hover {
		cursor: pointer;
	}
}

#messageArea {
	color: $green;
	font-size: 16px;
	margin: 10px 0;
}

.one,
.two,
.three,
.four,
.five,
.six {
	div {
		border: 2px solid $green;
		min-height: 10vh;
		//background: $grey;
		color: $green;
		display: flex;
  	justify-content: center;
  	align-items: center;
	}
}

.title {
	border: none !important;
	color: $green;
	font-size: 16px;
	text-align: center;
}

.hit {
	position: relative;
	&::before {
		content: '\f140';
		font-family: FontAwesome;
		position: absolute;
		left: 50%;
		font-size: 6vh;
		color: $green;
		display: block;
		height: 100%;
	}
}

.miss {
	position: relative;
	display: block;
	height: auto;
	&::before {
		content: '\f00d';
		font-family: FontAwesome;
		position: absolute;
		left: 50%;
		font-size: 6vh;
		color: $green;
	}
}
            
          
!

JS

            
              //FIRST DIGIT IS ROW, SECOND DIGIT IS COLUMN (LETTERS)
var shipPos = parseInt(Math.random()*6)+""+(parseInt(Math.random()*6)+1);
console.log(shipPos);
var coord;

document.getElementById("fireButton").onclick =
function(){
	var input = document.getElementById("guessInput").value;
	if(isValid(input)){
		//IF INPUT IN VALID, PROCEED TO CHECK IF IT HITS, 
		//MARK THE BOX THEY GUESSED
		//MAKE SURE THE ORDER OF THE INPUT IS ROW,COLUMN/LETTER (0-5,1-6)
		document.getElementById(coord).style.background = "red";
		document.getElementById("guessInput").placeholder = "Enter a letter and number (ex. A1)";
		document.getElementById("guessInput").select();
		if(coord == shipPos){
			document.getElementById(coord).style.background = "green";
			document.getElementById("output").innerHTML = "YOU HIT THE BATTLESHIP! YOU WIN!";
			document.getElementById("output").style.color = "green";
			document.getElementById("fireButton").disabled=true;
		}
		else{
			document.getElementById("output").innerHTML = "YOU MISSED THE BATTLESHIP!";
			document.getElementById("output").style.color = "green";
		}
	}
	else{
 		document.getElementById("guessInput").placeholder = "Not a valid input";
		document.getElementById("guessInput").value = "Not a valid input";
		document.getElementById("guessInput").select();
	}
};

function isValid(input){
	var array = input.split("",2);
	var letter = parseInt(convertToNum(array[0]));
	var num = parseInt(array[1]-1);
	coord = num+""+letter;
	console.log(coord);
	console.log(array);
	console.log(num);
	console.log(letter);
	if(num < 0 || num > 5 || letter < 1 || letter > 6){
		return false;
	}
	else{
		return true;
	}
}

function convertToNum(letter){
	if(letter == "A" || letter == "a"){
		return "1";
	}
	else if(letter == "B" || letter == "b"){
		return "2";
	}
	else if(letter == "C" || letter == "c"){
		return "3";
	}
	else if(letter == "D" || letter == "d"){
		return "4";
	}
	else if(letter == "E" || letter == "e"){
		return "5";
	}
	else if(letter == "F" || letter == "f"){
		return "6";
	}
	else{
		return "-1";
	}
}
            
          
!
999px

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