I have develop my website and want to get high page rank in Google, How it is possible to get Google Page Rank in quick period of time.
Keep getting good backlinks and build good content. If you do that sooner or later you will get there.
Yeah try to get more high pr backlinks on other web related homepages it will help improve PR faster.
Try and get as many high PR backlinks as you can from sites relevant to your own. Also, try to keep adding content on a regular basis and make sure your content is keyword rich but not keyword stuffed.
Backlinks and high quality content pages are going to be answers to your question but even doing your best, it will take some time and there is no quick shortcut way in the world of SEO.
Change the DOCTYPE to <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> and validate you page so you get the good page rank