   var ad_index = 0;
   var ad_time = 0;
   var ad_interval = 16;
   var done = 0;
   function filterCheck() {
	if(logo_download.filters.blendTrans) {
		filterApply();
	}
	else if (done == 0) {
		logo_download.style.visibility = "visible";
                done = 1; 
		var errMesg = "[ 경 고 ]\n\n귀하의 웹브라우저는 DHTML의 트랜지션(Transitions)을\n"
	     	+ "지원하지 않기 때문에 이를 응용한 대부분의 웹사이트에서\n" 
 	     	+ "스크립트 에러를 유발합니다!\n\n"
	     	+ "인터넷 익스플로러 4(5)를 정상적으로 다시 설치하도록 권장합니다!\n";
		alert(errMesg);
	}
   }
   function filterApply() {
        if (logo_download.filters(0).status == 2) {
            logo_download.filters(0).Stop();   
     
        if (logo_download.style.visibility == "hidden")
            logo_download.style.visibility = "visible";
           		 
        else
            logo_download.style.visibility = "hidden";
        window.setTimeout("filterApply();", 1);      
        }	 
        logo_download.filters(0).Apply();
        if (logo_download.style.visibility == "hidden")
	    logo_download.style.visibility = "visible";	          
        else
	    logo_download.style.visibility = "hidden";
        logo_download.filters(0).Play();              
    
   }
   function copyright() {
        ad_time ++;
        if (ad_time > ad_interval) {
             ad_time = 0;
             ad_index ++;
             if (ad_index == 1)
                  ad.innerHTML = "Designed by <b>Lee Dong-Han.</b>";
             else if (ad_index == 2)
                  ad.innerHTML = "Question? Comments? Talk to <b>bio028@channeli.net</b>";
             else {
                  ad.innerHTML = "For more tips and tricks, be sure to visit <b>Links</b> page!";
                  ad_index = 0;
             }
        }
        window.setTimeout("copyright();", 200);
   }
   function noteOnVisibility(objDiv) {
        var txt_Block = document.all(objDiv).style; 
        if (txt_Block.display == "none") {
	      txt_Block.display = "";	
        }          
        else {
	      txt_Block.display = "none";
        }              
   } 
   function noteOff(objDiv) {
        document.all(objDiv).style.display = "none";
   }
   function noteOn(objDiv) {
        document.all(objDiv).style.display = "";
   }