var isClicked = false;
function checkClicked() {
//あ
	if(window.document.readyState != null && window.document.readyState != 'complete') {
		if(isClicked) {
			return false;
		} else {
			return true;
		}
	}
	isClicked = true;
	return true;
}
function checkSubmit(obj) {
	var element = obj;
	if (checkClicked()) {
		element.form.submit();
	}
}

document.onkeydown = onkeyDownCheck;
if(document.layers) document.captureEvents(Event.KEYPRESS);
function onkeyDownCheck(e){ 
	var eventSrc = chkId(e);
	var keyCode = getKEYCODE(e);
	///INPUT except Enter & not text BackSpace except
	oElements = document.getElementsByTagName("input");
	for ( i = 0 ; i < oElements.length ; i++ ) { 
		if	(oElements[i].name == eventSrc &&  oElements[i].readOnly == false){
			if (keyCode == '13') { 
				return false;
			}
	    }
	}
}

function getKEYCODE(e){  
    if(document.all)           return  event.keyCode
    else if(document.getElementById) 
          return (e.keyCode!=0)?e.keyCode:e.charCode
    else if(document.layers)   return  e.which
}
MSIE = navigator.userAgent.indexOf("MSIE")!=-1 
function chkId(e){ 
	if(document.getElementById && !MSIE ){
	return  e.target.id;
	}else if(document.all) {
		return  event.srcElement.name;
	}
}