diff --git a/metadata/dbms/showrecord.js b/metadata/dbms/showrecord.js
index 2a5c384..4d28882 100644
--- a/metadata/dbms/showrecord.js
+++ b/metadata/dbms/showrecord.js
@@ -424,6 +424,31 @@ class SRec
 		//alert2(trt('Alert'),getXMLNodeSerialisation(this.nodeMetadata));
 	}
 
+	checkData(value,type,maybenull)
+	{
+
+		if(value==undefined) return false;
+		if(type=="i4")
+		{
+			if((value=="")&&(maybenull==0)) return false;
+			return isInt(value)
+		}else
+		if(type=="f8" || type=="f4")
+		{
+			if((value=="")&&(maybenull==0)) return false;
+			return isFloat(value);
+		}else
+		if(type=="object")
+		{
+			if(((value=="-1")||(value==""))&&(maybenull==0)) return false;
+		}else
+		if((type=="string")||(type=="b")||(type=="dateTime"))
+		{
+			if((value=="")&&(maybenull==0)) return false;
+		}
+		return true;
+	};
+
 	/** Function to send filter data to the server
 	 * id - id of record -1 then all
 	 * page - result page number
@@ -445,6 +470,12 @@ class SRec
 		{
 			if(nextNode.nodeName=="column")
 			{
+				if (!this.checkData(getCdataValue(nextNode),nextNode.getAttribute("vt"),nextNode.getAttribute("maybenull")))
+				{
+					alert2(trt('Alert'),trt("The_field_data_is_incorrect")+" \""+nextNode.getAttribute("d")+"\"=\""+getCdataValue(nextNode)+"\"!");
+					return;
+				}
+
 				if(nextNode.getAttribute("n")=="id" && id!=-1)
 				{
 					xs+='<column n="'+nextNode.getAttribute("n")+'" vt="'+nextNode.getAttribute("vt")+'" size="'+nextNode.getAttribute("size")+'">';
@@ -579,7 +610,8 @@ class SRec
 					//td2.style.cssText='white-space:nowrap'
 
 					td1.appendChild(document.createTextNode(columnNode.getAttribute("d")));
-					td1.style.cssText='white-space:nowrap;';
+					if(columnNode.getAttribute("maybenull")=='0') td1.style.cssText="white-space:nowrap;font-weight: bold;";
+					else td1.style.cssText='white-space:nowrap;';
 					if (columnNode.getAttribute("vt")==="dateTime")
 					{
 						let table=document.createElement('table');