/*--------------------------------------------------------------------------*
 *  
 *  imageReplace JavaScript Library beta3
 *  
 *  MIT-style license. 
 *  
 *  2007 Kazuma Nishihata 
 *  http://www.webcreativepark.net
 *
 *  modified version by Japanese Society of Anesthesiologists.
 *  
 *--------------------------------------------------------------------------*/

new function(){
	
	var ImagesDir = "images/";
	
	if(window.addEventListener){
		window.addEventListener('load',imageReplace,false);
	}else if(window.attachEvent){
		window.attachEvent('onload',imageReplace);
	}
	
	function imageReplace(){

		elements = document.getElementsByClassName("imageReplace");

		for (var i=0; i<elements.length; i++) {

			var element = elements[i];

			var classnames = element.getAttribute('className') || element.getAttribute('class');
			var classes = classnames.split(" ");
			if(classes[2]){
				var onImg  = " onmouseover=\"this.src='"+ImagesDir+classes[2]+"'\"";
				var offImg = " onmouseout=\"this.src='"+ImagesDir+classes[1]+"'\"";
			}else{
				var onImg  = "";
				var offImg = "";
			}
			if(classes[1])element.innerHTML = '<img src="'+ImagesDir+classes[1]+'" alt="'+element.innerHTML+'" id="imageReplace'+i+'" '+onImg+offImg+'/>';
		}
	}
	
	document.getElementsByClassName = function(className){
		var i, j, eltClass;
		var objAll = document.getElementsByTagName ? document.getElementsByTagName("*") : document.all;
		var objCN = new Array();
		for (i = 0; i < objAll.length; i++) {
			eltClass = objAll[i].className.split(/\s+/);
			for (j = 0; j < eltClass.length; j++) {
				if (eltClass[j] == className) {
					objCN.push(objAll[i]);
					break;
				}
			}
		}
		return objCN;
	}
}