function navOn(id){

	var imgSrc = "images/nav_on_" + id + ".gif";
	$(id).src = imgSrc;

}

function navOff(id){

	var imgSrc = "images/nav_off_" + id + ".gif";
	$(id).src = imgSrc;

}



function navOn1(id){

	var imgSrc = "../images/nav_on_" + id + ".gif";
	$(id).src = imgSrc;

}

function navOff1(id){

	var imgSrc = "../images/nav_off_" + id + ".gif";
	$(id).src = imgSrc;

}



function imageWin(img_src){
window.open ("../project_img/" + img_src,img_src,"status=0,toolbar=0,menubar=0,width=920,height=675,scrollbars=1"); 
}