window.onload = function(){

	var index = 0;
	var switchDisplay = function(){
		if(index == 1){
			document.getElementById('dateModule').style.display = 'block';
		}else{
			document.getElementById('dateModule').style.display = 'none';
		}
	}
	
	document.getElementById('changeDiplay').onclick = function(){
		index++;
		if(index >= 2){
			index = 0;
		}
		switchDisplay();
		//console.log('changeDiplay',index);
	}
	
	document.getElementById('delWindow').onclick = function(){
		index++;
		if(index >= 2){
			index =0;
		}
		switchDisplay();
		//console.log('delWindow',index);
	}
}