diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index 0e57118f4bb60..bd7ee30c2779c 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -619,6 +619,9 @@ function showdocuments($modulepart,$modulesubdir,$filedir,$urlsource,$genallowed
 					$out.= ' target="_blank">';
 					$out.= img_mime($file["name"],$langs->trans("File").': '.$file["name"]).' '.dol_trunc($file["name"],$maxfilenamelength);
 					$out.= '</a>'."\n";
+
+                    $out.= $this->showPreview($file,$modulepart,$relativepath);
+
 					$out.= '</td>';
 
 					// Show file size
@@ -739,6 +742,8 @@ function getDocumentsLink($modulepart, $modulesubdir, $filedir, $filter='')
     			$out.= img_mime($relativepath, $file["name"]);
     			$out.= '</a>'."\n";
 
+                $out.= $this->showPreview($file,$modulepart,$relativepath);
+
     			$this->infofiles['nboffiles']++;
     			$this->infofiles['files'][]=$file['fullname'];
     			$ext=pathinfo($file["name"], PATHINFO_EXTENSION);
@@ -859,6 +864,9 @@ function list_of_documents($filearray,$object,$modulepart,$param='',$forcedownlo
 					//print dol_trunc($file['name'],$maxlength,'middle');
 					print $file['name'];
 					print '</a>';
+
+                    print $this->showPreview($file,$modulepart,$filepath);
+
 					print "</td>\n";
 					print '<td align="right" width="80px">'.dol_print_size($file['size'],1,1).'</td>';
 					print '<td align="center" width="130px">'.dol_print_date($file['date'],"dayhour","tzuser").'</td>';
@@ -1320,5 +1328,30 @@ public function listOfLinks($object, $permtodelete=1, $action=null, $selected=nu
         return $nboflinks;
     }
 
+    /**
+     * Show detail icon with link for preview
+     * @param array     $file   File
+     * @param string    $modulepart     propal, facture, facture_fourn, ...
+     * @param string    $relativepath   Relative path of docs
+     * @return string   $out            Output string with HTML
+     */
+    public function showPreview($file, $modulepart, $relativepath){
+        global $langs, $conf;
+
+        if (empty($conf->use_javascript_ajax)) return '';
+
+        $out='';
+
+        $mime_preview = array('jpeg', 'png', 'gif', 'tiff', 'pdf', 'plain', 'css');
+        $num_mime = array_search(dol_mimetype($file['name'], '', 1), $mime_preview);
+
+        if( $num_mime!== false){
+            $out.= ' <a href="javascript:document_preview(\''.DOL_URL_ROOT.'/document.php?modulepart='.$modulepart.'&amp;attachment=0&amp;file='.urlencode($relativepath).'\',\''.dol_mimetype($file['name']).'\', \''.$file['name'].'\')">';
+            $out.=  img_picto($langs->trans('Preview'), 'detail').'</a>';
+
+            return $out;
+        }
+    }
+
 }
 
diff --git a/htdocs/core/js/lib_head.js.php b/htdocs/core/js/lib_head.js.php
index 0baea91412f6e..d64b05ccd8c95 100644
--- a/htdocs/core/js/lib_head.js.php
+++ b/htdocs/core/js/lib_head.js.php
@@ -948,6 +948,65 @@ function copyToClipboard(text,text2)
 	return false;
 }
 
+/*
+ * Function show document preview
+ * @params string file File path
+ * @params string type mime file
+ * @params string title
+ */
+function document_preview(file, type, title){
+
+	var ValidImageTypes = ["image/gif", "image/jpeg", "image/png"];
+
+	if ($.inArray(type, ValidImageTypes) < 0) {
+		var width='85%';
+		var object_width='100%';
+		var height = $( window ).height()*0.90;
+		var object_height='98%';
+
+		show_preview();
+
+	} else {
+		var object_width=0;
+		var object_height=0;
+
+		var img = new Image();
+
+		img.onload = function() {
+			object_width = this.width;
+			object_height = this.height;
+
+			width = $( window ).width()*0.90;
+			if(object_width < width){
+				width = object_width + 30
+			}
+			height = $( window ).height()*0.85;
+			if(object_height < height){
+				height = object_height + 80
+			}
+
+			show_preview();
+
+		};
+		img.src = file;
+
+	}
+	function show_preview(){
+
+		var newElem = '<object data="'+file+'" type="'+type+'" width="'+object_width+'" height="'+object_height+'"></object>';
+
+		$("#dialogforpopup").html(newElem);
+		$("#dialogforpopup").dialog({
+			closeOnEscape: true,
+			resizable: true,
+			width: width,
+			height: height,
+			modal: true,
+			title: title
+		});
+	}
+}
+
 /*
  * Provide a function to get an URL GET parameter in javascript 
  *