html show password

1function myFunction() {
2  var x = document.getElementById("*passwordbox-id*");
3  if (x.type === "password") {
4    x.type = "text";
5  } else {
6    x.type = "password";
7  }
8}

1//Javascript show all password textboxes script by me
2var k = document.getElementsByTagName('input')
3for(i=0;i<k.length;i++){
4    if(k[i].type = "password"){
5        k[i].type = "text"
6    }
7}