function trim(str)
{
   return str.replace(/^\s*|\s*$/g,"");
}

function echeck(str) {
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		var org=str.substring(ldot,ldot+4)	
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    return false
		 }
		 if (org.length < 3){
		 	return false
		 }		
		 	

 		 return true					
	}

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

	return result;
}
function allChar(str)
{
	return ValidCharSet(str,"abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}
function inValidCharSet(str,charset)
{
	var result = true;

		
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}
function validDate(formField,fieldLabel)
{
	var result = true;

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


function validNum(formField,fieldLabel)
{
	var result = true;
	
     if ((formField.value == "") )
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	else
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}
function ValidCharSet(str,charset)
{
	var result = true;

		
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}