function menu_activate(){    
            document.getElementById('subnav').style.visibility = 'visible';
}
        
function menu_deactivate(){
	if(document.getElementById(this) != 'wrapper')
	    document.getElementById('subnav').style.visibility = 'hidden';
}

function resize(id){        
    var elem = document.getElementById(id);
    var maxw = 400;
    var maxh = 550;
    if (elem.width > elem.height) {
        if (elem.width > maxw) elem.width = maxw;
    } 
    else {
        if (elem.height > maxh && elem.width < 0.8*elem.height) elem.height = maxh;
        else if(elem.height > maxh && elem.width >= 0.8*elem.height) elem.height = 0.8*maxh;
    }
}
    
function uniqueid(){
    var i;
    i = Math.random() * 100000;
    var datevar = new Date();
    var unqid = parseInt(datevar.getTime()) + i;
    return unqid;
}

function setimg(id){
                
    var imgsrc = document.getElementById(id).src;
    document.getElementById('unid').innerHTML ="<img src=" + imgsrc + " />"; 
    
}

function pageScroll() {
    	window.scrollBy(0,50); 
    	scrolldelay = setTimeout('pageScroll()', 100);
}