function chgMainPhoto(newPhoto){
	//change the picture
	var imgObj = getObjectByID('propertyPhoto');
	imgObj.src = newPhoto;
};

function chgOrganization(img){
	//change the picture
	document.organization.src = img;
	document.science.src = '//www.brainclouds.org/images/Sci_Button_final_110x110_bw.jpg';
	document.people.src = '//www.brainclouds.org/images/Peo_Button_final_110x110_bw.jpg';
	document.contribute.src = '//www.brainclouds.org/images/Con_Button_final_110x110_bw.jpg';
};

function chgScience(img){
	//change the picture
	document.science.src = img;
	document.organization.src = '//www.brainclouds.org/images/Org_Button_final_110x110_bw.jpg';
	document.people.src = '//www.brainclouds.org/images/Peo_Button_final_110x110_bw.jpg';
	document.contribute.src = '//www.brainclouds.org/images/Con_Button_final_110x110_bw.jpg';
};

function chgPeople(img){
	//change the picture
	document.people.src = img;
	document.organization.src = '//www.brainclouds.org/images/Org_Button_final_110x110_bw.jpg';
	document.science.src = '//www.brainclouds.org/images/Sci_Button_final_110x110_bw.jpg';
	document.contribute.src = '//www.brainclouds.org/images/Con_Button_final_110x110_bw.jpg';
};

function chgContribute(img){
	//change the picture
	document.contribute.src = img;
	document.organization.src = '//www.brainclouds.org/images/Org_Button_final_110x110_bw.jpg';
	document.science.src = '//www.brainclouds.org/images/Sci_Button_final_110x110_bw.jpg';
	document.people.src = '//www.brainclouds.org/images/Peo_Button_final_110x110_bw.jpg';
};

function getObjectByID(id) {
   if (document.getElementById) { // DOM-compliant browsers (MSIE5, NSN6, O5)
       return document.getElementById(id);
   } else if (document.all) { // MSIE4
       return document.all[id];
   } else if (document.layers) { // NSN4
       return document.layers[id];
   } else { // Trap DHTML-impaired browsers 
       //alert("Your browser does not support DHTML!");
       return false;
   }
};