function chkfields()
{
	var obj=document.contact_form;
	
	if(obj.name.value=="")
	{
		alert("Please enter your name ");
		obj.name.focus();
		return false;
	}
	if(obj.company.value=="")
	{
		alert("Please enter your company name ");
		obj.company.focus();
		return false;
	}
	if(obj.address.value=="")
	{
		alert("Please enter your address");
		obj.address.focus();
		return false;
	}
	if(obj.email.value=="")
	{
		alert("Please enter email address ");
		obj.email.focus();
		return false;
	}
	var emailFilter=/^.+@.+\..{2,3}$/;
	if(!emailFilter.test(obj.email.value)) { 
		alert("Error: Invalid Email!"); 
		obj.email.focus(); return false; 
	}
	if(obj.phone.value=="")
	{
		alert("Please enter your phone");
		obj.phone.focus();
		return false;
	}
	if(!IsNumeric(obj.phone.value))
	{
		alert("Invalid phone number");
		obj.phone.focus();
		return false;
	}
	if(obj.phone.value.length<10)
	{
		alert("Phone number should be 10 digit");
		obj.phone.focus();
		return false;
	}
	if(obj.besttime.value=="")
	{
		alert("Please select your best time to contact");
		obj.besttime.focus();
		return false;
	}
}
function IsNumeric(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;
   for (j = 0; j < sText.length && IsNumber == true; j++) 
      { 
      Char = sText.charAt(j); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}