/TypeScript/Uncaught TypeError: Cannot read property 'value' of undefined at Object.onChange

Uncaught TypeError: Cannot read property 'value' of undefined at Object.onChange

var x=document.form1.n1.value;
var y=document.form1.n2.value;
var z=document.form1.n3.value;
function verif(x,y,z){
    if (isNaN(x)|| isNaN(y) || isNaN(z))){
        alert("Verifier les champs de saisie");
        return false;
    }
    else { return true}
}
function compar(){
if(verif(x,y,z)){ 
    if (x==z==y){
    alert("les trois variables sont identiques");
}if ((x==z) || (z==y) || (x==y)){
    alert("Deux variables sont de valeurs égales");}
else{
        alert("les trois variables sont différentes");}}}

Similar codes

0 vote312 views1 answer
Typescript array to string
TypeScript
0 vote325 views1 answer
Test valeurs 2 flottants python
TypeScript
3 votes337 views2 answers
Conditional classes angular
TypeScript
-1 vote340 views2 answers
Whats a 3rd wheel
TypeScript
21 votes399 views6 answers
Ngclass angular
TypeScript
0 vote344 views1 answer
Matlab components area
TypeScript
1 vote315 views1 answer
Replace \n with breakline in type scripte
TypeScript
-1 vote343 views1 answer
Flutter border between expansiontile
TypeScript
0 vote318 views1 answer
Getstaticpaths errors after new posts
TypeScript
0 vote325 views1 answer
Can you make twitter bots in node.js
TypeScript