function invalidateViaURL() 
{ 
    var currQuery = location.search.substring(1); 
    location.href += (currQuery?"&":"?") + "inv=1"; 
} 

function ValidateGoogleCustom(e, loc)
{
    var key;     
    if(window.event)
        key = window.event.keyCode; //IE
    else
        key = e.which; //firefox  
    
    if(key == 13)
        window.location.href = loc;
}

function disableEnterKey(e)
{
     var key; 
     var obj    
     if(window.event)
     {
          key = window.event.keyCode; //IE
          obj = window.event.srcElement;
     }
     else
     {
          key = e.which; //firefox  
          obj = e.target;
     }  

     while (obj.nodeType != 1) {
	   obj = obj.parentNode;
     }
     if (obj.tagName == 'TEXTAREA')
       return true;
       
     return (key != 13);
}

function IsEnterKeyPress(e)
{
    var key;     
    if(window.event)
        key = window.event.keyCode; //IE
    else
        key = e.which; //firefox  
    
    if(key == 13)
        return true;
    else
        return false;
}