function validateEmail(emailaddress)
 {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
    if(reg.test(emailaddress) == false)
    {
      return false;
    }
   return true;
}


function Isnumeric(text)
{
    var strValidChars = "0123456789";
   var strChar;
   
   if (text.length != 0) 
	{	for (i = 0; i < text.length ; i++)
      	{
      		strChar = text.charAt(i);
      		if (strValidChars.indexOf(strChar) == -1)
         	{         		
         		return false;
         	}
         }
   }
return true; 
}

function Validate_DescriptiveText(field) {
   
   RegEx =/[A-Za-z0-9-,\s]+/;
    with (field) {

        if (value.match(RegEx)) {

            return true;
        } 
       else { 
        return false;        
        
        }
    
    
    
    }

}

function Validate_SingleString(field) {

    regEx = /[A-Za-z]/;
    with (field) {

        if (value.match(regEx)) {
            return true;
        }
        else {
            return false;
        }
        
      }

}
function validate_required(field,text)
{
with (field)
  {
  if (value==null||value==text)
    {
     return false;
    }
  else
    {
    return true;
    }
  }
} 

function checkDate(date)
{
var olddate=new Date().setDate(today.getDate()-2920);
if(date >= olddate)
{
return false;
}
else
{
return true;
}
}