var textareaID="";
    var textlandID="";
    var isSqm=false;
    var issSqm=false;
    var radiord1='';
    var radiord2='';   
    var radiord3='';
    var radiord4='';      
    function checkSelection(txtId1,rd,isSqmRd)
    {
        var txtId = txtId1;
        if (txtId=="")
        {
            txtId=textareaID;
        }
          
        var txt = document.getElementById(txtId);
        if (!isSqm && isSqmRd && rd.checked )
        {
           txt.value = convertFromSqftToSqm(txt.value);
           isSqm=true;
        }
        if (isSqm && !isSqmRd && rd.checked)
        {
            txt.value = convertFromSqmToSqft(txt.value);
            isSqm=false;
        }
           txt.focus();
           txt.blur();
           return;
        
    }
    
    function checkSelection1(txtId,rd,isSqmRd)
    {          
        var txt = document.getElementById(txtId);
        if (!issSqm && isSqmRd && rd.checked )
        {
           txt.value = convertFromSqftToSqm(txt.value);
           issSqm=true;
        }
        if (issSqm && !isSqmRd && rd.checked)
        {
            txt.value = convertFromSqmToSqft(txt.value);
            issSqm=false;
        }
           txt.focus();
           txt.blur();
           return;
        
    }
    
    function convertFromSqmToSqft(val)
    {
        var value =0;
        if (val != "")
            value=parseFloat(val.replace(/,/gi, ""));
        value=value * 10.7639;
        return getValue(value);
    }
    function convertFromSqftToSqm(val)
    {
        var value =0;
        if (val != "")
            value=parseFloat(val.replace(/,/gi, ""));
            
        value=value / 10.7639;
        return getValue(value);
    }
    function getValue(val)
    {
        return val.toFixed(2); 
    }
    
    function DropDownlistChangtextBox(optionvalue,textID)
    {
                      
            if(optionvalue.indexOf("HDB") >=0)
            {
              var radioitem=document.getElementById(radiord1);          
              if(!radioitem.checked)
              {
                  radioitem.checked=true;
                  var txt=document.getElementById(textID);
                  txt.value=convertFromSqftToSqm(txt.value);
                  isSqm=true;
              }
              if(radiord3!="")
              {
                  radioitem=document.getElementById(radiord3);          
                  if(!radioitem.checked)
                  {
                      radioitem.checked=true;
                      var txt=document.getElementById(textlandID);
                      txt.value=convertFromSqftToSqm(txt.value);
                      issSqm=true;
                  }
              }
              
            }
            else
            {
              var radioitem=document.getElementById(radiord2);
              if(!radioitem.checked)
              {
                  radioitem.checked=true;
                  var txt=document.getElementById(textID);
                  txt.value=convertFromSqmToSqft(txt.value);
                  isSqm=false;
              }
              
              if(radiord4!="")
              {
                  radioitem=document.getElementById(radiord4);
                  if(!radioitem.checked)
                  {
                      radioitem.checked=true;
                      var txt=document.getElementById(textlandID);
                      txt.value=convertFromSqmToSqft(txt.value);
                      issSqm=false;
                  }
              }
              
            }

    }
    
     function DropDownlistChangtextBoxDroplist(optionvalue,textID,drID)
    {
            var drlist=document.getElementById(drID);
            
                      
            if(optionvalue.indexOf("HDB") >=0)
            {
               drlist.options[1].selected=true;
               
              var radioitem=document.getElementById(radiord1);          
              if(!radioitem.checked)
              {
                  radioitem.checked=true;
                  var txt=document.getElementById(textID);
                  txt.value=convertFromSqftToSqm(txt.value);
                  isSqm=true;
              }
              if(radiord3!="")
              {
                  radioitem=document.getElementById(radiord3);          
                  if(!radioitem.checked)
                  {
                      radioitem.checked=true;
                      var txt=document.getElementById(textlandID);
                      txt.value=convertFromSqftToSqm(txt.value);
                      issSqm=true;
                  }
              }
              
            }
            else
            {
              var radioitem=document.getElementById(radiord2);
              if(!radioitem.checked)
              {
                  radioitem.checked=true;
                  var txt=document.getElementById(textID);
                  txt.value=convertFromSqmToSqft(txt.value);
                  isSqm=false;
              }
              
              if(radiord4!="")
              {
                  radioitem=document.getElementById(radiord4);
                  if(!radioitem.checked)
                  {
                      radioitem.checked=true;
                      var txt=document.getElementById(textlandID);
                      txt.value=convertFromSqmToSqft(txt.value);
                      issSqm=false;
                  }
              }
              
            }

    }