function imgRoll(img){
	if(img != ''){
		document.getElementById("ctl00_ContentPlaceHolder1_imgRollover").src = 'assets/images/' + img;
	}else{
		document.getElementById("ctl00_ContentPlaceHolder1_imgRollover").src = document.getElementById("ctl00_ContentPlaceHolder1_defaultArticleImg").value;
	}
}