function KeyDownEvent(){

    var event = arguments[0]||window.event;     
    var currentKey = event.charCode||event.keyCode;     
    //var eventSource =window.event.srcElement||eventTag.target;   
    
    if ( currentKey == 13){        
        currentKey = 9; 
        event.returnValue = false; 
        document.all["ButtonQuery"].click(); 
    } 
}