String.prototype.trim = function() {
	return this.replace(/(^\s*)|(\s*$)/g, "");
}
function setPng24(obj) { 
    obj.width=obj.height=1; 
    obj.className=obj.className.replace(/\bpng24\b/i,''); 
    obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');" 
    obj.src='';  
    return ''; 
} 
function searchCheckForm(){
	var f=document.searchcheck;
	if(f.keyword.value.trim() == ''){
		alert('°Ë»ö¾î¸¦ ÀÔ·ÂÇϼ¼¿ä');
		f.keyword.focus();
		return false;
	}
}
function mopen(menu_id){
	close_all_menu();
	var obj = document.getElementById('submenu_'+menu_id);
	obj.style.display = 'block';
}
function showmenu(menu_id, sub_id){
	var obj = document.getElementById('submenu_'+menu_id);
	obj.style.display = 'block';
}
function close_all_menu(){
	for (var i=1;i<=7;i++){
		document.getElementById('submenu_'+i).style.display = 'none';
	}
}
var current = 0;
function next(){
	var obj = document.getElementById("intro_roll");
	var objTd_old = obj.getElementsByTagName("TD")[current++];
	if (current >= 4) current = 0;
	var objTd_new = obj.getElementsByTagName("TD")[current];
	objTd_old.className = 'none';
	objTd_new.className = '';
}
function prev(){
	var obj = document.getElementById("intro_roll");
	var objTd_old = obj.getElementsByTagName("TD")[current--];
	if (current < 0) current = 3;
	var objTd_new = obj.getElementsByTagName("TD")[current];
	objTd_old.className = 'none';
	objTd_new.className = '';
}

function ChangeImage(src){
	var img = document.getElementById('big');
	img.src = "/bnc/stock/600/"+src;
}