(JAVASCRIPT AND HTML)

CALCULATOR

I need help turning a string into a mathematical operation. I cannot use JS eval function. I was thinking about using .split("") to split the string into an array of numbers and maybe use parseInt to turn "numbers" into actual numbers... but I do not know how to execute this. Can someone help?

/p>

"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

function display(num) {

var node = document.getElementById("display");

node.value+=num;

}

function result(op)

{

document.getElementById("display")=(document.getElementById("display").value).string("")

}

h1{

font-family: Arial;

color:#6495ED;

font-weight:normal;

font-size:150%;

padding-top:10px;

}

body {

text-align:center;

background-image: url("wall.jpg");

background-repeat:repeat-x;

}

.btn {

border: none;

outline: none;

padding: 10px 16px;

background-color: #CCFFFF;

cursor: pointer;

}

.active, .btn:hover {

background-color:#6495ED;

color: white;

}

.button input[type="button"]

{

font-size:170%;

padding:14px;

border-radius: 50%;

}

Simple calculator

src="http://www.w3.org/Icons/valid-xhtml11"

alt="Valid XHTML 1.1" height="31" width="88" />

Simple calculator 73 7 8 9 4 5 6* r XHTML