How to make the script or function inside execute when all images are loaded_javascript skills

Note:
The script is added at the end and cannot be in onload. When the script function or code is executed, it needs to ensure that the image is fully loaded.
Added at the end Write like this:
1. window.onload=function name;
Note: there are no double brackets after the function name;
or
2. window.onload=function(){
//Required Executed code
}