function subStr(str,length){
	var result = "";
	var idx1 = str.indexOf("<");
	if (idx1 < 0){
		result = str.substring(0,length);
		if (str.length > length){
			result = result + "....";
		}
	}else{
		var idx2 = str.indexOf(">");
		var str1 = str.substring(idx1,idx2+1);
		var str2 = str.substring(idx2+1,str.length+1);
		var idx3 = str2.indexOf("</");
		var str3 = str2.substring(0,idx3);
		var str4 = str2.substring(idx3,str2.length+1);
		var s = str3.substring(0,length);
		result = str1 + s + str4;
		if (str3.length > length){
			result = result + "....";
		}
	}
	return result;
}