data.chinahighlights.com/js/Priceselect.js

 function adjustPrice(e) //price select
{ 
	var _sTrNodes  =  e.parentNode.parentNode.childNodes;//[3].innerHTML ; 
	var _sPrice = null ;
	for(i = 0; i < _sTrNodes.length ;i++ )
	{
		 _sPrice  =  _sTrNodes[i].innerHTML ;  
		 
		if(_sPrice!=null&&_sPrice.indexOf("USD") > 0 &&  _sPrice.indexOf("RMB") > 0 )
	   {
		  break;
	   }
	} 
	if(_sPrice.indexOf("USD") > 0 ||  _sPrice.indexOf("RMB") > 0)
	{
	  document.getElementById("m_price").innerHTML= _sPrice +"/day";//click change value
      document.getElementById("h_price").value = _sPrice;//click 
   }
} 
 
function judgeform() {

    obj=document.getElementById("arrivaltime");
  if (obj.value== null || obj.value == ""){
     alert("Please fill up Check-in Date!");
	 obj.focus();
     return false;
  }   

  var obj=document.getElementById("realname");
  if (obj.value== null || obj.value == ""){
     alert("Please fill up your name!");
	 obj.focus();
     return false;
  }  
obj=document.getElementById("passport");
  if (obj.value== null || obj.value == ""){
     alert("Please enter the password!");
	 obj.focus();
     return false;
  }  
      obj=document.getElementById("nationality");
  if (obj.value== null || obj.value == ""){
     alert("Please enter your nationality!");
	 obj.focus();
     return false;
  }  
  
  
  obj=document.getElementById("email");
  if (obj.value== null || obj.value == ""){
     alert("Please fill up your email address!");
	 obj.focus();
     return false;
  }
  else{
     var pattern1 = /^(([\u4E00-\u9FA5]|[\uFE30-\uFEFF]|[\d]|[a-zA-Z]|[\_\-\.])+[\@])(((([\d]|[a-zA-Z]|[\_\-]|[\[\]\{\}\>\<])+[\.])+)([\d]|[a-zA-Z\_\-])+)$/;
	 str=obj.value
     if(!str.match(pattern1) ){
	     alert("Email error!");
		 obj.focus();
         return false;
	 }
  } 
   
  return true;
}