Problem Seven

seven.js

var resultCounter = 2,
    primeFlag = false,
    result = 0;
    prime = 1;

for ( var i = 0; resultCounter < 10001; i++ ) {

    primeFlag = false;
    
    for ( var j = 2; j <= Math.sqrt( i ); j++ ) {

        if ( i % j === 0 ) {
            primeFlag = false;
            break;
        }

        primeFlag = true;

    }

    if ( primeFlag ) {
        resultCounter++;
        result = i;
    }

};

document.write( result );