problem

var Player:MovieClip;
var jumpCount:Number;
var _isGrounded:Boolean;
var _solidsArray:Array = [sldTerrain1, sldTerrain2];

function applyMovement():void
{
    //handles velocity in the y direction
    if (_isGrounded == false)
    {
        Player.vy -= 1;
    }
    else
    {
        Player.vy = 0;
    }
}

function checkGrounded():void
{
    if (Player.hitTestObject(sldTerrain1.hitTop) || Player.hitTestObject(sldTerrain2.hitTop))
    {
        if (Player.vy < 0)
        {
            _isGrounded = true;
            jumpCount = 0;
        }
    }
    else
    {
        _isGrounded = false;
    }
}