var ie=document.all;

var nn6=document.getElementById&&!document.all;

var brw = nn6 ? "ff" : "ie";

var ifie6 = navigator.userAgent.toLowerCase().indexOf('msie 6'); // checked op ie6

var ifie7 = navigator.userAgent.toLowerCase().indexOf('msie 7'); // checked op ie7

brkStr = function(val,act,no)

{

	var arr_val = new Array();

	var arr_val = val.split(act);

	

	if(no == "last")

 	{

		val = arr_val.pop();

	}

	else

	{

		val = arr_val[no];

	}

	return val;

}


function mkRe(classname)

{

	var re = new RegExp('\\b' + classname + '\\b');

	return re;

}



mkchnSrc = function()

{ 	

	var doc_img = document.getElementsByTagName("IMG");

	var re = mkRe('chn_src');

	

	if(doc_img) 

	{				

		for (i=0; i<doc_img.length; i++) 

		{			

				if(re.test(doc_img[i].className))

				{

					doc_img[i].onmouseover = chnSrc;

					doc_img[i].onmouseout = chnSrc;

				}

		}		

	}	

	

	var doc_img = document.getElementsByTagName("INPUT");

	var re = mkRe('chn_src');

	

	if(doc_img) 

	{				

		for (i=0; i<doc_img.length; i++) 

		{			

				if(re.test(doc_img[i].className))

				{

					doc_img[i].onmouseover = chnSrc;

					doc_img[i].onmouseout = chnSrc;

				}

		}		

	}	

}

var filetype_chnSrc = "";

function chnSrc(e)

{	

	var act = nn6 ? e.type : event.type;

	var obj = nn6 ? e.target : event.srcElement;	

	var srclengte = obj.src.length;	

	var check_active_state = brkStr(obj.src,"_","last");



	if(act == "mouseover" && check_active_state != "active.jpg")

	{

		var srclengte_gestript = parseInt(srclengte) - 4;

		filetype_chnSrc = obj.src.substr(srclengte_gestript);

		var new_src = obj.src.substr(0, srclengte_gestript);

		obj.src = new_src + "_hover" + filetype_chnSrc;

	}

	else if(check_active_state != "active.jpg")

	{

		var srclengte_gestript = parseInt(srclengte) - 10;

		var new_src = obj.src.substr(0, srclengte_gestript);

		obj.src = new_src + filetype_chnSrc;	

	}	

}


/*
 * onload: mkchnSrc();

 *
 */