/*window.onload = function() {
    setContentHeightIMG()
}

window.onresize = setContentHeightIMG();
*/

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 = 600;

function setContentHeightIMG() {
	if (type=="IE") main_image_width=document.all['maintext'].offsetWidth;
	if (type=="NN") main_image_width=document.layer['maintext'].offsetWidth;
        if (type=="MO" || type=="OP")  main_image_width=document.getElementById('maintext').offsetWidth;
        
	if (main_image_width==0) main_image_width = 500;
        var new_image_width = main_image_width - 50;
		
        var new_image_height = new_image_width*(original_height/original_width) ;
	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 (type=="IE") 
		{
            document.all['main_image'].src = document.all['main_image_large'].src;
            document.all['main_image'].height = new_image_height;
	        document.all['main_image'].width = new_image_width;
		}

	if (type=="NN")
		{
                document.layer['main_image'].src = document.layer['main_image_large'].src;
                document.layer['main_image'].height = new_image_height;
                document.layer['main_image'].width = new_image_width;
		}
  	if (type=="MO" || type=="OP")
		{ 
            document.getElementById('main_image').src = document.getElementById('main_image_large').src;
            document.getElementById('main_image').height = new_image_height;
	        document.getElementById('main_image').width = new_image_width;
	        
	  	}
}