function validation()
  {
  	docF = document.frm_register;
	
	
	if(docF.email.value=='')
	{
		alert("Please provide email.");
		docF.email.focus();
		return false;
	}
	if(docF.email.value!='')
	{
		
   		var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   		var address = docF.email.value;
   		if(reg.test(address) == false) 
		{
      		alert('Invalid Email Address');
			docF.email.focus();
      		return false;
   		}

	}
	if(docF.security_code.value=='')
	{
		alert("Please provide security code.");
		docF.security_code.focus();
		return false;
	}
		return true;
		
  } 
  function echeck(str) {
		str=document.getElementById('email').value
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}
		else if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}
		else if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}
		else if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		 else if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }
		 else if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		 else if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		 else 
		 {
 		 	return true					
		 }
	}