function fieldchecks(myvar,name)
{
	if (myvar != ''  && IsAlpha(myvar) == false )
	{
		alert("You cannot use characters like ! @ # $ % ^ & * and '" );
		name.value='';
		name.focus();
		return false;
	}
}

function IsAlpha(sText)
{
   var ValidChars = "abcdefghijklmnopqrstuvwxyz,ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_()*+=-\][{}|;:,./<>?";
   var IsNumber=true;
   var Char;

   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
    Char = sText.charAt(i); 
    if (ValidChars.indexOf(Char) == -1) 
    {
        IsNumber = false;
     }
   }
   return IsNumber;
} 
function blankchk(myvar,name)
{
if(myvar=="" || myvar==" ")
	{
		alert("Please enter a value for the field");
		name.focus();
		return false;
	}
}