function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_o'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;

function chkform() {
  var form_name = 'request_items[]';
  value_array = new Array();
  
  if(document.form0.elements[form_name].checked == true){
	  value_array.push(document.form0.elements[form_name].value);
  }
  for(i=0; i < document.form0.elements[form_name].length; i++){
    if(document.form0.elements[form_name][i].checked == true){
	  value_array.push(document.form0.elements[form_name][i].value);
	}
  }
  if(value_array.length == 0){
    alert("「問い合わせする」チェックボックスを1つ以上選択してください");
    return false ;
  }
}