var ImageURL;
var isBigImage = false;

function ToggleBigPicture()
{
	if(this.ImageURL == null)
		return;
    if (document.getElementById)
	{
        var imageDiv = document.getElementById('image');
		if(this.isBigPicture)
		{
			imageDiv.innerHTML='<a href="javascript:ToggleBigPicture()"><img src="images/shop/small/' + this.ImageURL + '" alt="image" /></a>';
		}
		else
		{
			imageDiv.innerHTML='<a href="javascript:ToggleBigPicture()"><img src="images/shop/big/' + this.ImageURL + '" alt="image" /></a>';
		}
		this.isBigPicture = !this.isBigPicture;
	}
}

function PreLoadImage(url)
{
	this.ImageURL = url;
    if (document.images)
    {
		preload_image_object = new Image();
		preload_image_object.src = this.ImageURL;
    }
}