function get_body_width() {
 if (window.innerWidth) return window.innerWidth;
 else if (document.documentElement && document.documentElement.offsetWidth) return document.documentElement.offsetWidth;
 else return 0;
}

function get_body_height() {
 if (window.innerHeight) return window.innerHeight  ;
 else if (document.documentElement && document.documentElement.offsetHeight) return document.documentElement.offsetHeight;
 else return 0;
}

function fire_Event(control, evttype) {
	if (document.createEvent) {
		var evObj = document.createEvent('MouseEvents');
		evObj.initEvent(evttype, true, false );
		control.dispatchEvent(evObj);
	}
	else if (document.createEventObject) {
		control.fireEvent('on' + evttype);
	}
}