// JavaScript Document
    function toggleClass(element, value) {
     
      document.getElementById(element).className = value;
    
      }
	  function changeDivImage(num)
    {
        var imgPath = new String();
        imgPath = document.getElementById("main_img").style.backgroundImage;
       
        if(num == "1")//(imgPath == "url(img/main_community.jpg)" || imgPath == "")
        {
            document.getElementById("main_img").style.backgroundImage = "url(img/main_community.jpg)";
			toggleClass("a2", "disabled");
			toggleClass("a1", "active");
			toggleClass("a3", "disabled");
			toggleClass("a4", "disabled");
			toggleClass("a5", "disabled");
        }
        if(num == "2")//(imgPath == "url(img/main_apartments.jpg)" || imgPath == "")
        {
            document.getElementById("main_img").style.backgroundImage = "url(img/main_apartments.jpg)";
			toggleClass("a2", "active");
			toggleClass("a1", "disabled");
			toggleClass("a3", "disabled");
			toggleClass("a4", "disabled");
			toggleClass("a5", "disabled");
        }
		if(num == "3")//(imgPath == "url(img/main_residential.jpg)" || imgPath == "")
        {
            document.getElementById("main_img").style.backgroundImage = "url(img/main_residential.jpg)";
			toggleClass("a2", "disabled");
			toggleClass("a1", "disabled");
			toggleClass("a3", "active");
			toggleClass("a4", "disabled");
			toggleClass("a5", "disabled");

        }
		if(num == "4")//(imgPath == "url(img/collegiate_apartments.jpg)" || imgPath == "")
        {
            document.getElementById("main_img").style.backgroundImage = "url(img/collegiate_apartments.jpg)";
			toggleClass("a2", "disabled");
			toggleClass("a1", "disabled");
			toggleClass("a3", "disabled");
			toggleClass("a4", "active");
			toggleClass("a5", "disabled");

        }
		if(num == "5")//(imgPath == "url(img/cottages_apartments.jpg)" || imgPath == "")
        {
            document.getElementById("main_img").style.backgroundImage = "url(img/cottages_apartments.jpg)";
			toggleClass("a2", "disabled");
			toggleClass("a1", "disabled");
			toggleClass("a3", "disabled");
			toggleClass("a4", "disabled");
			toggleClass("a5", "active");

        }
    }