function showHide(el){
				if (document.getElementById(el).style.display == "none")
					document.getElementById(el).style.display = "";
				else
					document.getElementById(el).style.display = "none";
					
			}
			function hideAll()
			{
				document.getElementById('div_1').style.display = "none";
				document.getElementById('div_2').style.display = "none";
				document.getElementById('div_3').style.display = "none";
				document.getElementById('div_4').style.display = "none";
				document.getElementById('div_5').style.display = "none";
				
				document.getElementById('img1').src = 'images/btn_1.gif';
				document.getElementById('img2').src = 'images/btn_2.gif';
				document.getElementById('img3').src = 'images/btn_3.gif';
				document.getElementById('img4').src = 'images/btn_4.gif';
				document.getElementById('img5').src = 'images/btn_5.gif';
			}
			function show1()
			{
				hideAll();
				document.getElementById('div_1').style.display = "";
				document.getElementById('img1').src = 'images/btn_1_over.gif';
			}
			function show2()
			{
				hideAll();
				document.getElementById('div_2').style.display = "";
				document.getElementById('img2').src = 'images/btn_2_over.gif';
			}
			function show3()
			{
				hideAll();
				document.getElementById('div_3').style.display = "";
				document.getElementById('img3').src = 'images/btn_3_over.gif';
			}
			function show4()
			{
				hideAll();
				document.getElementById('div_4').style.display = "";
				document.getElementById('img4').src = 'images/btn_4_over.gif';
			}
			function show5()
			{
				hideAll();
				document.getElementById('div_5').style.display = "";
				document.getElementById('img5').src = 'images/btn_5_over.gif';
			}