		<!--to hide script contents from old browsers
		/*script programs written by nishino.*/
		/*sub window*/
		windowKov = "";
		kovUrl = "";
		kovName = "";
		kovWidth = "";
		kovHeight = "";
		function subWin(kovUrl,kovName,kovWidth,kovHeight) {
			window.parent.name = "mainWindow";
			if(Win && IE) {
				kovWidth+=14;kovHeight+=53;
				windowKov = window.open(kovUrl,kovName,"width="+kovWidth+",height="+kovHeight+",location=no,menubar=no,personalbar=no,directories=no,scrollbars=yes,status=yes,toolbar=no,copyhistory=no,resizable=yes,top=0,left=0");
			} else if(Win && NS) {
				kovWidth+=14;kovHeight+=53;
				windowKov = window.open(kovUrl,kovName,"width="+kovWidth+",height="+kovHeight+",location=no,menubar=no,personalbar=no,directories=no,scrollbars=yes,status=yes,toolbar=no,copyhistory=no,resizable=yes,top=0,left=0");
			} else if(Mac && IE) {
				kovWidth+=14;kovHeight+=53;
				windowKov = window.open(kovUrl,kovName,"width="+kovWidth+",height="+kovHeight+",location=no,menubar=no,personalbar=no,directories=no,scrollbars=yes,status=yes,toolbar=no,copyhistory=no,resizable=yes,top=0,left=0");
			} else if(Mac && NS) {
				kovWidth+=14;kovHeight+=53;
				windowKov = window.open(kovUrl,kovName,"width="+kovWidth+",height="+kovHeight+",location=no,menubar=no,personalbar=no,directories=no,scrollbars=yes,status=yes,toolbar=no,copyhistory=no,resizable=yes,top=0,left=0");
			} else {
				kovWidth+=14;kovHeight+=53;
				windowKov = window.open(kovUrl,kovName,"width="+kovWidth+",height="+kovHeight+",location=no,menubar=no,personalbar=no,directories=no,scrollbars=yes,status=yes,toolbar=no,copyhistory=no,resizable=yes,top=0,left=0");
			}
			windowKov.focus();
			windowKov.opener = self;
			if(windowKov.moveTo(0,0)) {
				windowKov.moveTo(0,0);
			}
		}
		function subWinBase(sTgt, sTtl, iW, iH, sScrl, sResize) {
			window.parent.name = "mainWindow";
			if(Win && IE) {
				window_sub = window.open(sTgt, sTtl,
							"width=" + iW + ",height=" + iH + ",location=no,menubar=no,personalbar=no,directories=no,scrollbars=" + sScrl + ",status=no,toolbar=no,copyhistory=no,resizable=" + sResize + ",top=0,left=0");
			} else if(Win && NS) {
				window_sub = window.open(sTgt, sTtl,
							"width=" + iW + ",height=" + iH + ",location=no,menubar=no,personalbar=no,directories=no,scrollbars=" + sScrl + ",status=no,toolbar=no,copyhistory=no,resizable=" + sResize + ",top=0,left=0");
			} else if(Mac && IE) {
				window_sub = window.open(sTgt, sTtl,
							"width=" + iW + ",height=" + iH + ",location=no,menubar=no,personalbar=no,directories=no,scrollbars=" + sScrl + ",status=no,toolbar=no,copyhistory=no,resizable=" + sResize + ",top=0,left=0");
			} else if(Mac && NS) {
				window_sub = window.open(sTgt, sTtl,
							"width=" + iW + ",height=" + iH + ",location=no,menubar=no,personalbar=no,directories=no,scrollbars=" + sScrl + ",status=no,toolbar=no,copyhistory=no,resizable=" + sResize + ",top=0,left=0");
			} else {
				window_sub = window.open(sTgt, sTtl,
							"width=" + iW + ",height=" + iH + ",location=no,menubar=no,personalbar=no,directories=no,scrollbars=" + sScrl + ",status=no,toolbar=no,copyhistory=no,resizable=" + sResize + ",top=0,left=0");
			}
			window_sub.focus();
			window_sub.opener = self;
		}
/*		window_sub = "";
		function subWin() {
			window.parent.name = "mainWindow";
			if(Win && IE) {
				window_sub = window.open("","sub_window","width=380,height=550,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else if(Win && NS) {
				window_sub = window.open("","sub_window","width=380,height=540,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else if(Mac && IE) {
				window_sub = window.open("","sub_window","width=365,height=510,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else if(Mac && NS) {
				window_sub = window.open("","sub_window","width=380,height=515,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else {
				window_sub = window.open("","sub_window","width=370,height=575,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			window_sub.focus();
			window_sub.opener = self;
		}
*/
		window_teach = "";
		function teachWin() {
			window.parent.name = "mainWindow";
			if(Win && IE) {
				window_teach = window.open("","teach_window","width=550,height=350,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else if(Win && NS) {
				window_teach = window.open("","teach_window","width=550,height=350,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else if(Mac && IE) {
				window_teach = window.open("","teach_window","width=552,height=351,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else if(Mac && NS) {
				window_teach = window.open("","teach_window","width=552,height=351,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			else {
				window_teach = window.open("","teach_window","width=550,height=350,location=no,menubar=no,personalbar=no,directories=no,scrollbars=no,status=no,toolbar=no,copyhistory=no,resizable=no,top=0,left=0");
			}
			window_teach.focus();
			window_teach.opener = self;
		}
		
		function subWin0() {
			window.open('subwin/freelesson.html','freelesson','toolbar=no,location=no,status=no,scrollbars=yes,resizable=yes,width=460,height=380');
		}

		// end hiding contents from old browsers  -->