function  validation(){

    if(document.getElementById('con_name').value==""){

	   alert("Please enter the name");

	   document.getElementById('con_name').focus();

	   return false;

	 }



	 if(document.getElementById('con_email').value==""){

	   alert("Please enter the con_email-Id");

	   document.getElementById('con_email').focus();

	   return false;

	 }

	  

	 if(document.getElementById('con_email').value.length >0) {

	 i=document.getElementById('con_email').value.indexOf("@")

	 j=document.getElementById('con_email').value.indexOf(".",i)

	 k=document.getElementById('con_email').value.indexOf(",")

	 kk=document.getElementById('con_email').value.indexOf(" ")

	 jj=document.getElementById('con_email').value.lastIndexOf(".")+1

	 len=document.getElementById('con_email').value.length

		}

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

 	}

 	else {

 		alert("Please enter a valid email address.\n" +

		document.getElementById('con_email').value + " is invalid.");

		return false;

		 } 

		 

  if(document.getElementById('con_phone').value==""){

	   alert("Please enter contact number");

	   document.getElementById('con_phone').focus();

	   return false;

	 }

	 

	  if(document.getElementById('con_subject').value==""){

	   alert("Please enter subject");

	   document.getElementById('con_subject').focus();

	   return false;

	 }

  if(document.getElementById('comment').value==""){

	   alert("Please enter comments");

	   document.getElementById('comment').focus();

	   return false;

	 }
  if(document.getElementById('secnumber').value==""){

	   alert("Please enter security code");

	   document.getElementById('secnumber').focus();

	   return false;

	 }
 return true;

}