function checkfield()
{
var form=document.feedback;


 if(form.name.value=='')
 {
 alert("Enter your Name");
  form.name.focus();
  return false;
 
 }
 
  if(form.address.value=='')
 {
 alert("Enter your Address");
  form.address.focus();
  return false;
 
 }
 
 if(form.phone.value!='')
	{
 	 	    
			if (!isNumeric(form.phone.value))
		   {
			validity = false; 
			alert('Please enter valid phone (Numeric Only)'); 
			form.phone.focus();
		   return false;
		   }
		   
	}



 

if(form.mail.value=="")
	{
 	 	  alert("Enter Your email");	
		  form.mail.focus();
		  return false;
		 
	}
	if (!echeck(form.mail.value))
  	{ 
  	validity = false; alert('Please enter valid email id!'); 
	form.mail.focus();
   return false;
  	}

 if(form.mail.value!=form.cmail.value)
	{
 	 	  alert("Please confirm your email id..");	
		  form.cmail.value='';
		  form.cmail.focus();
		  return false;
		 
	}  
	
 if(form.country.value=='')
 {
 alert("Enter your country");
  form.country.focus();
  return false;
 
 }
 
 
 	   if(form.captcha.value=='')
 {
 alert("Enter the code shown ");
  form.captcha.focus();
  return false;
 
 }
	
	//==============validateemail=====================

function echeck(str)
	 {
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		//trace(lat)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1) 
		{
		   return false
		}

		if (str.indexOf(at)==0 || str.indexOf(at)==lstr)
		{
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
		{
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1)
		 {
		    return false
		 }
			
		 if (str.indexOf(" ")!=-1)
		 {
		    return false
		 }
		if(lstr==ldot+1)
	    return false
 		 return true
	}
   //===================================

  if(form.captcha.value=='')
 {
 alert("Enter the code ");
  form.captcha.focus();
  return false;
 
 }
 
  return true;
 
 }
 
 
 



 
 function isNumeric(InString)  
		   {
			if(InString.length==0) return (false);
			var RefString="1234567890";
			var f=0;
			for (Count=0; Count < InString.length; Count++)  
				{
				TempChar= InString.substring (Count, Count+1);
				if (RefString.indexOf (TempChar, 0)==-1)
				    {
						f=0;
						return false
					}
					else
					{
				   		 f=1;
					}
				}
					
					
					
					if(f==0) return false
					if(f==1) return true
					
					
			}