// 只允许输入数字
function IsDigit(){
  return ((event.keyCode >= 48) && (event.keyCode <= 57));
}

function textCounter(field, countfield, maxlimit) {
if (field.value.length > maxlimit) 
field.value = field.value.substring(0,maxlimit);
else 
countfield.value = maxlimit - field.value.length;
}

function CheckAll(form,way)  {
  for (var i=0;i<form.elements.length;i++)    {
    var e = form.elements[i];
    if (e.name.toLowerCase() == 'id')
		switch(way.toLowerCase()){
			case 'a':
				e.checked = true; break;
			case 'r':
				e.checked = !e.checked; break;
			case 'c':
				e.checked = false; break;
		}		
  }
}
function ChangeStyle(val){
	var obj = document.getElementById("UnitPrice");
	switch(parseInt(val)){
		case 0:
			obj.innerHTML = "元/月"; break;
		case 1:
			obj.innerHTML = "万元"; break;
		case 2:
			obj.innerHTML = "元/月"; break;
		case 3:
			obj.innerHTML = "万元"; break;
	}	
}