Fixed validation

src/views/demoComponent/DemoComponent9.js

         setMargins(event.target.value);
     }
 
-    const validateMargins = () => {
-        const array = (margins).split(",");
-        let allNums = true;
-        array.forEach(function (element) {if (isNaN(element)) {allNums = false; setMargins("");}});
-        if (array.length === 4 && (margins).split(",").length === 4 && allNums === true) {
-            return true;
-        } else {
-            return false;
-        }
-    }
-
     const exec = () => {
-        if (!validateMargins()) {
+        if (!margins.match(/^(\d+\s?(mm)?),(\d+\s?(mm)?),(\d+\s?(mm)?),(\d+\s?(mm)?)$|^(\d+\s?(cm)?),(\d+\s?(cm)?),(\d+\s?(cm)?),(\d+\s?(cm)?)$/)) {
             alert("Incorrect margin parameters");
             return;
         }