--- user_list.tpl.bak  2012-10-29 16:15:31.447316179 +0100
+++ user_list.tpl  2012-10-29 14:19:35.536823678 +0100
@@ -10,7 +10,7 @@
     <label>{'Password'|@translate} <input type="password" name="password"></label>
     <label>{'Confirm Password'|@translate} <input type="password" name="password_conf" id="password_conf"></label>
     {else}
-    <label>{'Password'|@translate} <input type="text" name="password"></label>
+    <label>{'Password'|@translate} <input type="text" name="password" onclick="GeneratePassword(this)"></label>
     {/if}
     <label>{'Email address'|@translate} <input type="text" name="email"></label>
     <label>{'Send connection settings by email'|@translate} <input type="checkbox" name="send_password_by_mail" value="1" checked="checked"></label>
@@ -284,7 +284,56 @@
   }
   return true;
 }
-);{/literal}
+);
+
+function GeneratePassword(input) {
+    var length=21;
+    var sPassword = "";
+    
+    var lowercase = true;
+    var uppercase = true;
+    var figures = true;
+    var punction = false;
+ 
+    for (i=1; i <= length; i++) {
+ 
+        numI = getRandomNum();
+        if ((punction == 0 && checkPunc(numI)) || (figures == 0 && checkFigures(numI)) ||(uppercase == 0 && checkUppercase(numI))) {
+    i -= 1;
+    } else {
+      sPassword = sPassword + String.fromCharCode(numI);
+    }
+    }
+  input.value=sPassword; 
+    return true;
+}
+ 
+function getRandomNum() {
+    // between 0 - 1
+    var rndNum = Math.random()
+    // rndNum from 0 - 1000
+    rndNum = parseInt(rndNum * 1000);
+    // rndNum from 33 - 127
+    rndNum = (rndNum % 94) + 33;
+    return rndNum;
+}
+ 
+function checkPunc(num) {
+    if (((num >=33) && (num <=47)) || ((num >=58) && (num <=64))) return true; 
+    if (((num >=91) && (num <=96)) || ((num >=123) && (num <=126)))  return true; 
+    return false;
+}
+
+function checkFigures(num) {
+    if ((num >=48) && (num <=57)) return true; 
+    else  return false; 
+}
+
+function checkUppercase(num) {
+    if ((num >=65) && (num <=90)) return true; 
+    else return false;
+}{/literal}
+
 // ]]>
 </script>