function showbg1(num)
		  {
				var trArr=new Array('a1','a2','a3');
				var divArr=new Array('con_a_0','con_a_1','con_a_2');
				for(i=0;i<3;i++)
				{
					if(i==num)
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu09.jpg)';");
						eval("document.getElementById(divArr[i]).style.display='block';");
						eval("document.getElementById(trArr[i]).className='on';");
					}
					else
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu9.jpg)';");
						eval("document.getElementById(divArr[i]).style.display='none'");
						eval("document.getElementById(trArr[i]).className='li';");
					}
				}
		  }		
		
		  function showbg2(num)
		  {
				var trArr=new Array('b1','b2','b3','b4');
				var divArr=new Array('con_b_0','con_b_1','con_b_2');
				for(i=0;i<4;i++)
				{
					if(i==num)
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu09.jpg)';");
						eval("document.getElementById(divArr[i]).style.display='block';");
						eval("document.getElementById(trArr[i]).className='on';");
					}
					else
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu9.jpg)';");
						eval("document.getElementById(divArr[i]).style.display='none'");
						eval("document.getElementById(trArr[i]).className='li';");
					}
				}
		  }		
				
		function showbg3(num)
		  {
				var trArr=new Array('bg1','bg2');
				var divArr=new Array('con_tab_0','con_tab_1');
				for(i=0;i<2;i++)
				{
					if(i==num)
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu09.jpg)';");
						eval("document.getElementById(divArr[i]).style.display='block';");
						eval("document.getElementById(trArr[i]).className='on';");
					}
					else
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu9.jpg)';");
						eval("document.getElementById(divArr[i]).style.display='none'");
						eval("document.getElementById(trArr[i]).className='li';");
					}
				}
		  }


		  function showbg4(num)
		  {
				var trArr=new Array('b_1','b_2');
				var divArr=new Array('con_0','con_1');
				for(i=0;i<2;i++)
				{
					if(i==num)
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu09.gif)';");
						eval("document.getElementById(divArr[i]).style.display='block';");
						eval("document.getElementById(trArr[i]).className='on';");
					}
					else
					{
						eval("document.getElementById(trArr[i]).style.backgroundImage='url(images/bg_menu9.gif)';");
						eval("document.getElementById(divArr[i]).style.display='none'");
						eval("document.getElementById(trArr[i]).className='li';");
					}
				}
		  }