function checkdate( month, day, year ) {
    var myDate = new Date();
    myDate.setFullYear( year, (month - 1), day );
 
    return ( (myDate.getMonth()+1) == month );
}

function checkValidImageFormat(imgName){
	
	if(imgName){
		var file = imgName.split(".");
		var numkeys = file.length;
		var type = file[numkeys-1];
		
		if(type.toUpperCase() == "JPG" || type.toUpperCase() == "JPEG" || type.toUpperCase() == "GIF" || type.toUpperCase() == "PNG"){
			//all ok!
			return true;	
		}else{
			return false;;	
		}
	}else{
		return false;
	}
	
}

function checkVideoUrl(url){
	
	if(url){
		if(!url.match(/^(.+)\.youtube\.com\/watch\?v=/) && !url.match(/^http:\/\/video\.google\.com/)){
			return false;
		}else{
			return true;
		}
	}else{
		return true;
	}
	
}