function verify(form)
        {
           	var passed = true;
        		var blnRetval, intAtSign, intDot, intComma, intSpace, intLastDot, intDomain, intStrLen;
        		
            intAtSign=form.T3.value.indexOf("@");
            intDot=form.T3.value.indexOf(".",intAtSign);
            intComma=form.T3.value.indexOf(",");
            intSpace=form.T3.value.indexOf(" ");
            intLastDot=form.T3.value.lastIndexOf(".");
            intDomain=intDot-intAtSign;
            intStrLen=form.T3.value.length; 
            
            document.getElementById('error_1').style.visibility = 'hidden';
            document.getElementById('error_2').style.visibility = 'hidden';
            document.getElementById('error_3').style.visibility = 'hidden';
                   		
            if (form.T4.value == "" )
            		{
                		document.getElementById('error_2').style.visibility = 'visible';
                		form.T4.focus();
                		passed = false;
            		}                                                            		
            if (form.T3.value == "" )
                {
                		document.getElementById('error_1').style.visibility = 'visible';
                		form.T3.focus();
                		passed = false;
                }
            else if (intAtSign == -1)
                {
                		document.getElementById('error_3').style.visibility = 'visible';
                		form.T3.focus();
                		passed = false;
                }
            else if (intComma != -1)
                {
                		document.getElementById('error_3').style.visibility = 'visible';
                		form.T3.focus();
                		passed = false;
                }
            else if (intSpace != -1)
                {
                		document.getElementById('error_3').style.visibility = 'visible';
                		form.T3.focus();
                		passed = false;
                }
            else if ((intDot <= 2) || (intDomain <= 1)  || (intStrLen-(intLastDot+1) < 2))
                {
                		document.getElementById('error_3').style.visibility = 'visible';
                		form.T3.focus();
                		passed = false;
                }
		 return passed;
  }

function verify_2(form)
        {
           	var passed = false;
           	
           document.getElementById('error_4').style.visibility = 'hidden';          	
                
            for (var i=0; i < form.R1.length; i++)
              {
                if (form.R1[i].checked)
                  {
                    passed = true;
                  }
              }                
                                                                         
            if (passed != true) document.getElementById('error_4').style.visibility = 'visible';
          	
            return passed;  
            
        }