function validation()
{
if(document.getElementById('f_name').value =='')

		  {

		  alert("Please Enter Your First Name");

		  document.getElementById("f_name").focus();

		  return false;

		  }

if(document.getElementById('l_name').value =='')

		  {

		  alert("Please Enter Your Last Name");

		  document.getElementById("l_name").focus();

		  return false;

		  }

if (document.getElementById("email").value == "")

		{

			alert("Please Enter Email");

			document.getElementById("email").focus();

			return false;

		}

if(document.getElementById('email').value != "")

	    {

	    fieldValue = document.getElementById('email').value;

		if ( fieldValue == '')

		{

			alert("Please Enter Email");

			document.getElementById("email").focus();

			return false;

		}

		else

		{

			i=fieldValue.indexOf("@")

			j=fieldValue.indexOf(".",i)

			k=fieldValue.indexOf(",")

			kk=fieldValue.indexOf(" ")

			jj=fieldValue.lastIndexOf(".")+1

			len=fieldValue.length

		

			if ((i>0) && (j>(1+1)) && (k==-1) && (kk==-1) && (len-jj >=2) && (len-jj<=3)) 

			{

				/* Right Email Address  */

			}

			else

			{

				//document.getElementById('rightformate').style.display = 'block';

				alert("Please Enter Valid Email Address in the Given Formate mail@email.com");

				document.getElementById("email").focus();

				return false;

			}

		}

	}
if(document.getElementById('phone').value !='' && !IsNumeric(document.getElementById('phone').value) )

		  {

		  alert("Please Enter only Numeric fields in phone code ");

		  document.getElementById("phone").focus();

		  return false;

		  }	
		  
if(document.getElementById('state').value =='')

		  {

		  alert("Please Enter Your State");

		  document.getElementById("state").focus();

		  return false;

		  }
if(document.getElementById('zip').value !='' && !IsNumeric(document.getElementById('zip').value) )

		  {

		  alert("Please Enter only Numeric fields in zip code ");

		  document.getElementById("zip").focus();

		  return false;

		  }			  
if(document.getElementById('interest').value =='')

		  {

		  alert("Please Select Your interest");

		  document.getElementById("interest").focus();

		  return false;

		  }		  
		  


return true;
}

function IsNumeric(sText)
{
	var ValidChars = "0123456789.";
    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;
}