function isNumberKey(obj) {
	if( /[^0-9\-]|-{2,}/gi.test(obj.value) ) {
		obj.value = ""; // line added to clear textbox value
		obj.focus();
		return false;
	}
	return true;
}

function textboxValue(obj,val){
    var tmp = (obj.value==val) ? '' : (obj.value=='') ? val : obj.value;
    if (tmp != obj.value)
        obj.value = tmp;
}

function fullscreen(turl){
    if (window.open(turl, '', 'fullscreen=yes, scrollbars=auto')) return false;
    else return true;
}

function getQuerystring(key, default_){

	if (default_==null) default_=""; 
		key = key.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
	var regex = new RegExp("[\\?&]"+key+"=([^&#]*)");
	var qs = regex.exec(window.location.href);

	if(qs == null)
		return default_;
	else
		return qs[1];
}