window.onload = function() {
    adjustmainimage();
}

window.onresize = function() {
    adjustmainimage();
}

if (navigator.userAgent.indexOf("Opera")!=-1 && document.getElementById) type="OP";
if (document.all) type="IE";
if (document.layers) type="NN";
if (!document.all && document.getElementById) type="MO";

var MAX_height = 12000;

function adjustmainimage() {
	if (type=="IE") main_image_width=document.all['header'].offsetWidth;
	if (type=="NN") main_image_width=document.layer['header'].offsetWidth;
        if (type=="MO" || type=="OP")  main_image_width=document.getElementById('header').offsetWidth;
        
	if (main_image_width == 0)
	{
	   main_image_width = 410;
    }
    
    if (type=="IE") {
        main_image_width = main_image_width - 202;
    }
    
    var new_image_width = main_image_width;
    var new_image_height = new_image_width*(705/1000);
        
	if (new_image_height > MAX_height)
		{
			new_image_width = MAX_height/original_height*original_width;
			new_image_height=MAX_height;
		}
    if (new_image_width > MAX_height)
		{
			new_image_height = (new_image_height/new_image_width)*MAX_height;
			new_image_width=MAX_height;
		}
    
    if(new_image_width < 600) {
        document.getElementById('mainimage').src = "/images/frontsmall.jpg";
    } else if(new_image_width < 1000) {
        document.getElementById('mainimage').src = "/images/frontmed.jpg";
    } else {
        document.getElementById('mainimage').src = "/images/frontbig.jpg";
    }
    
    document.getElementById('mainimage').height = new_image_height;
    document.getElementById('mainimage').width = new_image_width;
    sideheight = new_image_height - 15;
    if(sideheight < 270) { sideheight=270; }
    document.getElementById('sidebar').style.height = sideheight + "px";
}