function WM_toggle(id1, id2, id3, id4, id5, id6){

   if (document.all)
   {

     if(document.all[id1].style.display == 'none')
	 {

       document.all[id1].style.display = '';
	   	if (document.all[id2].style.display != 'none')
		   document.all[id2].style.display = 'none';
	    if (document.all[id3].style.display != 'none')
		   document.all[id3].style.display = 'none';
		if (document.all[id4].style.display != 'none')
		   document.all[id4].style.display = 'none';
		if (document.all[id5].style.display != 'none')
		   document.all[id5].style.display = 'none';
		if (document.all[id6].style.display != 'none')
		   document.all[id6].style.display = 'none';
  	    
		/*
		if (document.all[id7].style.display != 'none')
	   		document.all[id7].style.display = 'none';
  	    if (document.all[id8].style.display != 'none')
	   		document.all[id8].style.display = 'none';
		*/
		
     } 
	 else 
	 {
		 //alert("khong dc");

       document.all[id1].style.display = 'none';

     }
   }
   else //if (document.getElementById)
   {
		var o1, o2, o3, o4, o5, o6;
		o1 = document.getElementById(id1);
		o2 = document.getElementById(id2);
		o3 = document.getElementById(id3);
		o4 = document.getElementById(id4);
		o5 = document.getElementById(id5);
		o6 = document.getElementById(id6);
		
		if(o1.style.display == 'none')
		 {	
		    o1.style.display = '';
			if (o2.style.display != 'none')
			   o2.style.display = 'none';
			if (o3.style.display != 'none')
			   o3.style.display = 'none';
			if (o4.style.display != 'none')
			   o4.style.display = 'none';
			if (o5.style.display != 'none')
			   o5.style.display = 'none';
			if (o6.style.display != 'none')
			   o6.style.display = 'none';			
		 } 
		 else 
		 {
		   o1.style.display = 'none';
		 }
	   //alert("khong dc");
   }

 }
 
 function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validInt(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var num = parseInt(formField.value,10);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0],10);
  			var day = parseInt(elems[1],10);
 			var year = parseInt(elems[2],10);
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}

function validateForm(theForm)
{
	// Customize these calls for your form

	// Start ------->
	if (!validRequired(theForm.txtName,"Name"))
		return false;

	if (!validEmail(theForm.txtEmail,"Email Address",true))
		return false;
	if (!validRequired(theForm.txtEnquiry,"Enquiry"))
		return false;

 	// <--------- End
	
	return true;
}