function echeck(str) {

		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
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}




  
 function validate_submit()
  {
      with (document.registration_form) {

          if (email.value == "") {
              alert("Please fill in your email!!");
              email.focus();
              return false;
          }

          else if (echeck(email.value) == false) {

              email.value = "";
              email.focus();
              return false;
          }

          else if (password.value == "") {
              alert("Please fill in your password!!");
              password.focus();
              return false;
          }

          else if (password.value != confirmpassword.value) {
              alert("The confirm password mismatch with your enter password!!");
              password.value = "";
              confirmpassword.value = "";
              confirmpassword.focus();
              return false
          }

          else if (name.value == "") {
              alert("Please fill in your name!!");
              name.focus();
              return false;
          }
          else if (telM.value == "") {
              alert("Please fill in your mobile phone number!");
              telM.focus();
              return false;
          }

          else if (organization.value == "") {
              alert("Please fill in your organization!!");
              organization.focus();
              return false;
          }

          else if (SecurityCode.value == "") {
              alert("Please fill the code show in image above!!");
              SecurityCode.focus();
              return false;
          }

          else if (securitynum.value != SecurityCode.value) {
              alert("The character you enter does not match with the code show in image above!!");
              SecurityCode.value = "";
              SecurityCode.focus();
              return false;
          }

          else {
              return true;
          }

      }
    
  }


function validate_login(formname)
  {
     with (formname)
	  {
	
        if (txt_username.value =="")
        {
            alert("Please fill in your username!!");
            txt_username.focus();
             return false;
         }

			    
        else if (txt_password.value =="")
        {
            alert("Please fill in your password!!");
            txt_password.focus();
             return false;
         }

		else{
            return true;
        }
         
	 }
    
  }