[Javascript] image preloader doubt

[asureshkumar_1983 at yahoo.co.in (suresh kumar)]

Hi,
      I am having one doubt regarding image preloader in javascript.I am working in digital signange system for displaying ads in mall,shops.I am using image preloader function to get images from server and load into client RAM and displaying images one after another using <img> tag.
     I am little bit worried ,suppose if user  contain 100-200 images,whether image preloader function will load  all the images to the  users RAM at a time  or it  will load the first image and display it and at the same time it will load image and display it and so on. 
    I want to know how Image preloader function works, and  is there any other solution other than what i specified above.i also want to know whether the user want to have large RAM size for storing image.
   

 				
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