function show_tab(num)
		  {
				var trArr=new Array('tp1','tp2','tp3');
				var divArr=new Array('arr1','arr2','arr3');
				var tp1=new Array('../images/tab_01.gif','../images/tab_02.gif','../images/tab_03.gif');
				var tp2=new Array('../images/tab_1.gif','../images/tab_2.gif','../images/tab_3.gif');
				for(i=0;i<3;i++)
				{
					if(i==num)
					{
						eval("document.getElementById(trArr[i]).src=tp1[i];");
						eval("document.getElementById(divArr[i]).style.display='block';");
					}
					else
					{
						eval("document.getElementById(trArr[i]).src=tp2[i];");
						eval("document.getElementById(divArr[i]).style.display='none';");
					}
				}
		  }