为什么我的JS函数总是返回true？

Question

import numpy as np
import cv2

frame = cv2.imread( '/home/nirvan/img_two.png' , cv2.IMREAD_GRAYSCALE)
string = ' '.join(map(str,frame.flatten().tolist()))

frameCopy = frame.copy()

x = frame.shape[0]
y = frame.shape[1]

frame = string.strip()
temp = [ int(t) for t in frame.split(' ')]
temp = np.array(temp)
temp = temp.reshape( (x,y) )

print( np.array_equal(frameCopy , temp) )

#gives black screen
cv2.imshow('l' , np.array(temp) )

#gives proper image
#cv2.imshow('l' , np.array(frameCopy) )

cv2.waitKey()

HTML：

function validateForm() {
    if (document.getElementById('name').value = "") {
        alert('Name field is required!');
        document.getElementById('name').focus();
        return false;
    } else if (document.getElementById('email').value = "") {
        alert("Email field is required!");
        document.getElementById('email').focus();
        return false;
    } else if (document.getElementById('password1').value != document.getElementById('password2').value) {
        alert("Passwords have to match!");
        return false;
    }
    return true;
}

为什么它总是返回true，即使其中一个字段为空？