function inc_store_product_qty(objId, intMaxQty)
{
	objField = document.getElementById(objId);
	if ( intMaxQty == 0 )
		objField.value++;
	else if ( objField.value < intMaxQty )
		objField.value++;
}

function dec_store_product_qty(objId, intMinQty)
{
	objField = document.getElementById(objId);
	if ( intMinQty == 0 )
	{
		if ( objField.value > 1 )
			objField.value--;
	}
	else if ( (objField.value > intMinQty) && (objField.value > 1) )
		objField.value--;
}

function validate_store_product_qty(objId, intMinQty, intMaxQty)
{
	objField = document.getElementById(objId);
	if ( parseFloat(objField.value) < parseFloat(intMinQty) )
	{
		if ( intMinQty < 0 )
			objField.value = 0;
		else
			objField.value = intMinQty;
	}
	
	if ( parseFloat(objField.value) > parseFloat(intMaxQty) )
	{
		if ( intMaxQty < 0 )
			objField.value = 0;
		else
			objField.value = intMaxQty;
	}
}

function toggle_product_image_layer(strId, intTotalImages)
{
	for(i=0; i<intTotalImages; i++)
	{
		if(document.getElementById('catalogproducts_lpic_' + i))
			document.getElementById('catalogproducts_lpic_' + i).style.display = 'none';
	}
		
	document.getElementById('catalogproducts_lpic_' + strId).style.display = 'block';
}