function opTab(v) {
		if (v=="1"){
			document.getElementById("tab1on").style.display = "block";
			document.getElementById("tab1off").style.display = "none";
			document.getElementById("tab_contents1").style.display = "block";
			document.getElementById("tab2on").style.display = "none";
			document.getElementById("tab2off").style.display = "block";
			document.getElementById("tab_contents2").style.display = "none";
		} else {
			document.getElementById("tab1on").style.display = "none";
			document.getElementById("tab1off").style.display = "block";
			document.getElementById("tab_contents1").style.display = "none";
			document.getElementById("tab2on").style.display = "block";
			document.getElementById("tab2off").style.display = "none";
			document.getElementById("tab_contents2").style.display = "block";
		}
	}