/**
 * 防止重复提交
 */
var checkSubmitFlg = false;
function checkSubmit(submit_id) {
	if (checkSubmitFlg == true) { 
		return false;
	}
	checkSubmitFlg = true; 
	document.getElementById(submit_id).disabled=true;
	window.history.forward(1);
	location.replace(this.href); 
	return true; 
}
document.onclick = function doconclick() {
	if (checkSubmitFlg) {
		window.event.returnValue = false;
	}
};