function checkOcxInstall() {
    try
    {
        new ActiveXObject("TTVNC.TTVNCCtrl.1");
	return true;
    }catch(ex){
        return false;
    }
}
        	
function getAccesscode(){
    return document.getElementById("accesscode").value;
	}
function checkAccessCode(){
	var accesscode=0; accesscode=getAccesscode();
    if(accesscode.length<1){alert('请输入验证码！');}
    else if(accesscode.length!=10){alert('请输入正确的验证码！');}
    else if(!isNum(accesscode)){alert('请输入正确的验证码！');}
    else{

        if(!checkOcxInstall()) 
        {
            alert("系统检测到您尚未安装远程接管控件,点击确定进行安装,此过程需要您等待数十秒... ...");
            st = '<OBJECT id="DttvncClient" classid="clsid:7F88B22A-06AB-4B11-8E8D-0D035435221B"  codebase="/UserCenter/rtocab/ttserver.cab#VERSION=3,3,3,0"  VIEWASTEXT>'; 
            st += '  <PARAM NAME="_Version" VALUE="65536">'; 
            st += '  <PARAM NAME="_ExtentX" VALUE="2646">'; 
            st += '  <PARAM NAME="_ExtentY" VALUE="1323">'; 
            st += '  <PARAM NAME="_StockProps" VALUE="0">'; 
            st += '</OBJECT>';
            document.getElementById('ObjectX').innerHTML=st;
            //disableaccess(true);
        }
        else
        {
            st = '<OBJECT id="DttvncClient" classid="clsid:7F88B22A-06AB-4B11-8E8D-0D035435221B"  codebase="/UserCenter/rtocab/ttserver.cab#VERSION=3,3,3,0"  VIEWASTEXT>'; 
            st += '  <PARAM NAME="_Version" VALUE="65536">'; 
            st += '  <PARAM NAME="_ExtentX" VALUE="2646">'; 
            st += '  <PARAM NAME="_ExtentY" VALUE="1323">'; 
            st += '  <PARAM NAME="_StockProps" VALUE="0">'; 
            st += '</OBJECT>';
            document.getElementById('ObjectX').innerHTML=st;
			disableaccess(true);
        }
     }
            return false;	
}