function onlyChar()
  {
    if(((event.keyCode>=97)&&(event.keyCode<=122)) 
        || ((event.keyCode>=65)&&(event.keyCode<=90))
        || ((event.keyCode==46)||(event.keyCode==32)))
        
           event.keyCode=event.keyCode;
    else
           event.keyCode=0;
  }
 

//This function used for numeric check 
function onlyInt()
   {
     if((event.keyCode>=48)&&(event.keyCode<=57))
     {
        event.keyCode=event.keyCode;
     }
     else
     {
       event.keyCode=0;
      
     }
  }


  //This function used for float check 
function onlyFloat()
   {
     if(((event.keyCode>=48)&&(event.keyCode<=57)) || (event.keyCode==46))
     {
        event.keyCode=event.keyCode;
     }
     else
     {
       event.keyCode=0;
      
     }
  }