diff --git a/TrimSP.html b/TrimSP.html
index 53a8f1a..94e807a 100644
--- a/TrimSP.html
+++ b/TrimSP.html
@@ -31,14 +31,14 @@
 	    <tr>
 	      <td style="vertical-align: top;">
 		<table cellpadding="5">
-		  <tr>
+		  <tr id="FileRow">
 		    <td><label>File name prefix:</label></td>
 		    <td>
 		      <input name="fileNamePrefix" id="fileNamePrefix" type="text" style="width:70%" value="SrTiO3"/>
 		      <input name="trimPath" id="trimPath" type="text" style="width:70%;visibility:hidden;"/>
 		    </td>
 		  </tr>
-		  <tr>
+		  <tr id="FolderRow">
 		    <td><label>Save folder:</label></td>
 		    <td>
 		      <input type="text" style="width:70%" id="workPath" name="workPath" readonly/>
@@ -46,6 +46,7 @@
 			     id="browseFolde" onclick="ipcRenderer.send('browseFolder');">
 		    </td>
 		  </tr>
+		  <tr>
 		    <td><label>Number of Layers:</label></td>
 		    <td><input name="numLayer" id="numLayer" type="number" size="3" step="1" min="1" max="100" value="1" onchange="adjust_table()"></td>
 		  </tr>
@@ -374,8 +375,22 @@
   // Open the default Layers tab
   document.getElementById("btnLayers").click();
 
-  // Set up after first load (electron specific menu calls)
-  firstLoad();
-
+  let webOrApp = amIWeb();
+  
+  if (webOrApp) {
+      console.log('this script is not running in Node.js');
+      // Run as a web app
+      //let row = document.getElementById("FileRow");
+      //row.parentNode.removeChild(row);
+      //row = document.getElementById("FolderRow");
+      //row.parentNode.removeChild(row);
+      document.getElementById("FileRow").style.visibility = "hidden";;
+      document.getElementById("FolderRow").style.visibility = "hidden";;
+  } else {
+      console.log('this script is running in Node.js');
+      // Run as standalone app
+      // Set up after first load (electron specific menu calls)
+      firstLoad();
+  }
 </script>
 </html>
diff --git a/TrimSPlib.js b/TrimSPlib.js
index 837badc..865b751 100644
--- a/TrimSPlib.js
+++ b/TrimSPlib.js
@@ -1045,15 +1045,25 @@ function sum(array){
 function startSequence(All) {
     let cmd = '';
     let trimBin = All['trimPath']+"/trimspNL";
-    // Check if the trimspNL binary is found
-    if (!fileExists(trimBin)) {
-	// if not found, try in PATH and hope for the best
-	trimBin = "trimspNL";
+    let randStr = '';
+    let webOrApp = amIWeb();
+    // Only for Node.js 
+    if (!webOrApp) {
+	// Check if the trimspNL binary is found
+	if (!fileExists(trimBin)) {
+	    // if not found, try in PATH and hope for the best
+	    trimBin = "trimspNL";
+	}
+    
+	// Check if workPath exists otherwise create it
+	checkDir(All['workPath']); // from TrimSPelec.js, Electron/Node specific
+    } else {
+	// Add random string (5 char) to file names
+	randStr = (Math.random() + 1).toString(36).substring(7);
+	All["fileNamePrefix"] = randStr;
+	All["workPath"] = "/tmp/" + randStr;
     }
     
-    // Check if workPath exists otherwise create it
-    checkDir(All['workPath']); // from TrimSPelec.js, Electron/Node specific
-
     let Progress =0;
     document.getElementById("pBar").style.width = Progress + "%";
     document.getElementById("pBar").innerHTML = Progress + "%";
@@ -1120,15 +1130,17 @@ function startSequence(All) {
 	let eingabe1=CreateInpFile(All);
 	if (eingabe1=="ERROR") {return(0);}
 	let FILENAME=All["workPath"]+"/"+All["fileNamePrefix"]+"_"+ScanName+SValue;
-	writeAsciiFile(FILENAME+".inp",eingabe1)
-	// Prepare command and execute
-	cmd = "cd " + All["workPath"];
-	cmd += ";cp " + FILENAME + ".inp eingabe1.inp";
-	cmd += ";" + trimBin;
-	cmd += "; mv -f ausgabe1.rge " + FILENAME + ".reg";
-	cmd += "; mv -f ausgabe1.out " + FILENAME + ".out";
-	cmd += "; mv -f ausgabe1.err " + FILENAME + ".err";
-	execute(cmd);
+	writeAsciiFile(FILENAME+".inp",eingabe1);
+	if (!webOrApp) {
+	    // Prepare command and execute
+	    cmd = "cd " + All["workPath"];
+	    cmd += ";cp " + FILENAME + ".inp eingabe1.inp";
+	    cmd += ";" + trimBin;
+	    cmd += "; mv -f ausgabe1.rge " + FILENAME + ".reg";
+	    cmd += "; mv -f ausgabe1.out " + FILENAME + ".out";
+	    cmd += "; mv -f ausgabe1.err " + FILENAME + ".err";
+	    execute(cmd);
+	}
 	// Single run: End
 
 	// Read stopping profiels
@@ -1182,7 +1194,7 @@ function startSequence(All) {
     writeAsciiFile(seq_file, data);
 
     // Remove the fort.33 and other redundant files
-    cmd="cd "+All["workPath"]+";rm -f eingabe1.inp; rm -f fort.33";
+    cmd="cd " + All["workPath"] + ";rm -f eingabe1.inp; rm -f fort.33";
     execute(cmd);
     Progress=100;
     document.getElementById("pBar").style.width = Progress + "%";
@@ -1190,17 +1202,13 @@ function startSequence(All) {
     return(0);
 }
 
-function readDatFile(filename,flag) {
+function readDatFile(filename) {
     // Read column data file and return
-    // flag=1 use XMLHttpRequest
     // cols - labels of columns
     // data - 2D array with the columns
     let lines = "";
-    if (flag) {
-	lines = loadAscii(filename);
-    } else {
-	lines = readAsciiFile(filename);
-    }
+    lines = readAsciiFile(filename);
+    
     let data = [];
     let i=0; // line counter
     for (let line of lines.trim().split('\n')) {
@@ -1323,106 +1331,13 @@ function startSim() {
     //  "http://musruser.psi.ch/cgi-bin/TrimSP.cgi?TrimSPcfg="+TrimSPcfg+'go=start';
 }
 
-// Function to load and ascii file 
-// async read, be careful with use
-function loadAscii(file){
-    var xhttp;
-    if (file == "" || file == undefined || file == null) {
-        return 0;
+function amIWeb() {
+    if (typeof module !== 'undefined' && module.exports) {
+	// Run as standalone app
+	return 0;
     } else {
-        // Make an HTTP request using the attribute value as the file name:
-        xhttp = new XMLHttpRequest();
-        xhttp.onreadystatechange = function() {
-            if (this.readyState == 4) {
-                if (this.status == 404) {
-                    console.log("File "+file+" not found.");
-                }
-            }
-        }
-	file += "?" + Date();
-        xhttp.open("GET", file, false);
-        xhttp.send();
-	return(xhttp.responseText);
+	// Run as a web app
+	return 1;
     }
 }
 
-function sendToCGI(){
-   let args = "";
-   let All = prep_cfg(1);
-   for (key of Object.keys(All)) {
-      args += "&" + key + "=" + All[key] ;
-   }
-   let url = "http://musruser.psi.ch/cgi-bin/TrimSP2.cgi?go=start" + args;
-   console.log(url);
-
-   // document.getElementById("form_id").action = url;
-   var xhttp = new XMLHttpRequest();
-   xhttp.onreadystatechange = function() {
-    if (this.readyState == 4 && this.status == 200) {
-       // Action to be performed when the document is read;
-       let parser = new DOMParser();
-       let xmlDoc = parser.parseFromString(xhttp.responseText,"text/html");
-       console.log(xmlDoc.getElementById("links").innerHTML);
-       document.getElementById("links").innerHTML = xmlDoc.getElementById("links").innerHTML;
-       // Now we can plot things
-       plotThings(All);
-    }
-   };
-   xhttp.open("GET",url,true);
-   //xhttp.responseType = 'document';
-   xhttp.send();    
-}
-
-function plotThings(All) {
-    let fileNamePrefix = All["fileNamePrefix"];
-    let path = "/tmp/"+fileNamePrefix+"/";
-    //let fileName = path + fileNamePrefix + ".rge";
-    //let rgeDat = loadAscii(fileName);
-    //console.log(rgeDat);
-    if (All["scanSeq"]) {
-	// For multiple runs or a scan
-	if (All["scanType"]=="scanVals") {
-	    var SValues=All["scanList"].split(/,/);
-	    var SdzValues=All["scanListdz"].split(/,/);
-	    if (SValues.length == SdzValues.length) {All["SdzFlag"]=1;}
-	} else {
-	    for (let Val=parseInt(All["scanFrom"]);Val<=parseInt(All["scanTo"]);Val=Val+parseInt(All["scanStep"])) {
-		SValues.push(Val);
-	    }
-	}
-
-	let ScanName = "";
-	let ScanAttrib = "";
-	ScanName = "E";
-	ScanAttrib = "valEnergy";
-	if (All["comboScan"]==1) {
-	    ScanName = "SigE";
-	    ScanAttrib = "sigEnergy";
-	} else if (All["comboScan"]==2) {
-	    ScanName = "Angle";
-	    ScanAttrib = "valAngle";
-	} else if (All["comboScan"]==3) {
-	    ScanName = "SigAngle";
-	    ScanAttrib = "sigAngle";
-	} else if (All["comboScan"]==4) {
-	    ScanName = "N";
-	    ScanAttrib = "numberProj";
-	} else if (All["comboScan"]==5) { 
-	    ScanName = "Ld"+All["scandL"];
-	    ScanAttrib = "L"+All["scandL"]+"d";
-	}
-	
-	let iScan=0;
-	for (var SValue of SValues) {
-	    let fileName = path + fileNamePrefix + "_" + ScanName + SValue + ".rge";
-	    let [cols,data]= readDatFile(fileName,1);
-	    console.log(fileName,cols,data);
-	}
-    } else {
-	// For a single run
-	let fileName = path + fileNamePrefix + ".rge";
-	let [cols,data]= readDatFile(fileName,1);
-	console.log(fileName,cols,data);
-    }
-
-}
diff --git a/TrimSPweb.js b/TrimSPweb.js
new file mode 100644
index 0000000..d54f4f9
--- /dev/null
+++ b/TrimSPweb.js
@@ -0,0 +1,79 @@
+// This file contains function that are web app specific
+function getFiles(dir, filelist){
+    fileList = [];
+    return fileList;
+}
+
+function execute(command) {
+//    exec(command, {stdio: 'inherit'});
+}
+
+function checkDir(directory) {
+    // Check whether directory exists, if not create it
+    return(1);
+}
+
+function writeAsciiFile(filename,content) {
+    // Write string content into ascii file filename
+    // Go via CGI script
+    //console.log(filename, content);
+    // Prepare CGI args
+    let cgiargs = "?fn="+filename;
+    let lines = content.split(/\n/);
+    for (let i=0; i<lines.length; i++) {
+	cgiargs += "&line" + i + "=" + lines[i];
+    }
+
+    var xhttp;
+    xhttp = new XMLHttpRequest();
+    xhttp.onreadystatechange = function() {
+        if (this.readyState == 4 && this.status == 200) {
+	    //console.log("resptext=",xhttp.responseText);
+	} else if (this.readyState == 4) {
+	    console.log(xhttp.status, xhttp.statusText);
+	}
+    }
+    let request = "/cgi-bin/try.cgi"+cgiargs;
+    xhttp.open("GET", request, false);
+    xhttp.send();
+    return(1);
+}
+
+function readAsciiFile(filename) {
+    // Read ascii file filename and return content in a string
+    var xhttp;
+    let file = filename;
+    if (filename == "" || filename == undefined || filename == null) {
+        return 0;
+    } else {
+        // Make an HTTP request
+        xhttp = new XMLHttpRequest();
+        xhttp.onreadystatechange = function() {
+            if (this.readyState == 4) {
+		if (this.status == 404) {
+                    console.log("File "+file+" not found.");
+		    return(0);
+                }
+	    }
+	}
+	// Force refresh, do not use cache
+	filename += "?" + Date();
+	//filename = "http://musruser.psi.ch" + filename;
+        xhttp.open("GET", filename, false);
+        xhttp.send();
+	return(xhttp.responseText);
+    }
+}
+	       
+function fileExists(filename) {
+    var xhr = new XMLHttpRequest();
+    xhr.open('HEAD', filename, false);
+    xhr.send();
+     
+    if (xhr.status == "404") {
+        return 0;
+    } else {
+        return 1;
+    }
+}
+