Noname

function lineDistance(p1, p2) {
    var xs;
    var ys;
    var p1 = {
        x1: document.getElementById("p1x1").value,
        y1: document.getElementById("p1y1").value
    };
    var p2 = {
        x1: document.getElementById("p2x1").value,
        y1: document.getElementById("p2y1").value
    };
    var p3 = {
        x1: document.getElementById("p3x1").value,
        y1: document.getElementById("p3y1").value
    };

    xs = p2.x1 - p1.x1;
    xs = xs * xs;

    ys = p2.y1 - p2.y1;
    ys = ys * ys;

    var distance = Math.sqrt(xs + ys);

    document.getElementById("demo").innerHTML = distance;
}