function narrow(SEL) {
	var list = document.getElementById('scheduletable').getElementsByTagName('tr');
	
	if(SEL.options[SEL.selectedIndex].value=='all'){
		for(var i=0;i<list.length;i++)
		list[i].style.display = '';
		return;
	}
	for(var i=1;i<SEL.options.length;i++){
		for(var i=0;i<list.length;i++) {
		list[i].style.display = 
			(list[i].className.indexOf(SEL.options[SEL.selectedIndex].value)>=0)?'':'none';
		}
	}
}
//複数のwindowonloadを指定できるscript
function addOnloadEvent(fnc){  
  if ( typeof window.addEventListener != "undefined" )  
    window.addEventListener( "load", fnc, false );  
  else if ( typeof window.attachEvent != "undefined" ) {  
    window.attachEvent( "onload", fnc );  
  }  
  else {  
    if ( window.onload != null ) {  
      var oldOnload = window.onload;  
      window.onload = function ( e ) {  
        oldOnload( e );  
        window[fnc]();  
      };  
    }  
    else  
      window.onload = fnc;  
  }  
}

function PreLoad(obj,val) {
    var d = document;
    var img = obj;
    d.img = new Image();
    d.img.src = val;
}