var IE6 = true;
if(navigator.appVersion.indexOf('MSIE 5.5')>=0){
  }else if(navigator.appVersion.indexOf('MSIE 6.0')>=0){
  }else if(navigator.appVersion.indexOf('MSIE 7.0')>=0){
  }else if(navigator.appVersion.indexOf('MSIE 8.0')>=0){
  }else{IE6 = false;}
function mdown(e) {if (navigator.appName == "Microsoft Internet Explorer") {if (event.button == 2) {alert("右クリックは使用出来ません。");return(false);}} else if (navigator.appName == "Netscape") {if (e.which == 3) {return(false);}}}if (document.all) {document.onmousedown = mdown;}if (document.layers) {window.onmousedown = mdown;window.captureEvents(Event.MOUSEDOWN);}