How to make a click through sprite? Unity 4.6beta20

Hey, how could I simply make a sprite not block anything even if it’s in front of the mouse?

function Update()
{
if( Input.GetMouseButtonDown(0) )
{
var hits : RaycastHit2D = Physics2D.RaycastAll( Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero );
for( hit in hits )
{
if( hit.collider != null )
{
//Check here for your sprite like:
if( hit.collider.gameObject.name == “MyGameObject” )
{
Debug.Log(“MyObject Was clicked”);
}
}
}
}
}

Untested but should work