These are the errors I get; 

client.java:16116: 'else' without 'if'
                                else if(useItemID == 436 && atObjectID == 2781 &
& playerLevel[13] >=  0) // Using Tin ore on a furnace.  Produces 1 Bronze bar.
                                ^
client.java:16127: 'else' without 'if'
                                else if(useItemID == 440 && atObjectID == 2781 &
& playerLevel[13] >=  5) // Using Iron ore on a furnace.  Produces 1 Iron bar.
                                ^
client.java:16138: 'else' without 'if'
                                else if(useItemID == 453 && atObjectID == 2781 &
& playerLevel[13] >=  10) // Using Coal ore on a furnace.  Produces 1 Steel bar.

                                ^
client.java:16149: 'else' without 'if'
                                else if(useItemID == 447 && atObjectID == 2781 &
& playerLevel[13] >=  20) // Using Mithril ore on a furnace.  Produces 1 Mithril
 bar.
                                ^
client.java:16160: 'else' without 'if'
                                else if(useItemID == 449 && atObjectID == 2781 &
& playerLevel[13] >=  45) // Using Adament ore on a furnace.  Produces 1 Adament
 bar.
                                ^
client.java:16171: 'else' without 'if'
                                else if(useItemID == 451 && atObjectID == 2781 &
& playerLevel[13] >=  75) // Using Runite ore on a furnace.  Produces 1 Runite b
ar.
                                ^
client.java:16184: 'else' without 'if'
                                else if(useItemID == 4830 && atObjectID == 5284)
 // Bone grinding
                                ^
7 errors
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and this is the code where the errors are;

				//  This part is simple Smelting.

                               	else if(useItemID == 436 && atObjectID == 2781) // Using Tin ore on a furnace.  Produces 1 Bronze bar.
				{
                                startAnimation(899);
				addItem(2349, 1);
				{
				sendMessage("You make a Bronze bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((25*playerLevel[13]), 13);
                                deleteItem(436,getItemSlot(436), 1);
				}

                               	else if(useItemID == 436 && atObjectID == 2781 && playerLevel[13] >=  0) // Using Tin ore on a furnace.  Produces 1 Bronze bar.
				{
                                startAnimation(899);
				addItem(2349, 1);
				{
				sendMessage("You make a Bronze bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((25*playerLevel[13]), 13);
                                deleteItem(436,getItemSlot(436), 1);
				}

                               	else if(useItemID == 440 && atObjectID == 2781 && playerLevel[13] >=  5) // Using Iron ore on a furnace.  Produces 1 Iron bar.
				{
                                startAnimation(899);
				addItem(2351, 1);
				{
				sendMessage("You make an Iron bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((50*playerLevel[13]), 13);
                                deleteItem(440,getItemSlot(440), 1);
				}

                               	else if(useItemID == 453 && atObjectID == 2781 && playerLevel[13] >=  10) // Using Coal ore on a furnace.  Produces 1 Steel bar.
				{
                                startAnimation(899);
				addItem(2353, 1);
				{
				sendMessage("You make a Steel bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((75*playerLevel[13]), 13);
                                deleteItem(453,getItemSlot(453), 1);
				}

                               	else if(useItemID == 447 && atObjectID == 2781 && playerLevel[13] >=  20) // Using Mithril ore on a furnace.  Produces 1 Mithril bar.
				{
                                startAnimation(899);
				addItem(2359, 1);
				{
				sendMessage("You make a Mithril bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((100*playerLevel[13]), 13);
                                deleteItem(447,getItemSlot(447), 1);
				}

                               	else if(useItemID == 449 && atObjectID == 2781 && playerLevel[13] >=  45) // Using Adament ore on a furnace.  Produces 1 Adament bar.
				{
                                startAnimation(899);
				addItem(2361, 1);
				{
				sendMessage("You make a Adament bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((150*playerLevel[13]), 13);
                                deleteItem(449,getItemSlot(449), 1);
				}

                               	else if(useItemID == 451 && atObjectID == 2781 && playerLevel[13] >=  75) // Using Runite ore on a furnace.  Produces 1 Runite bar.
				{
                                startAnimation(899);
				addItem(2363, 1);
				{
				sendMessage("You make a Runite bar.");
				pSay("Ouch!  It's roasting hot!");
                                addSkillXP((150*playerLevel[13]), 13);
                                deleteItem(451,getItemSlot(451), 1);
				}

				//  The "Runite Smelting" above was the last.