function validation_advertise()
 {
	 var emailID=document.getElementById('email');
	 if(document.getElementById('name').value=='')
	  {
		   alert('Please enter your name');
		   document.getElementById('name').focus();
		   return false;
	   }
	 if(!isNaN(document.getElementById('name').value))
		{
				   alert('Please enter character only');
				     document.getElementById('name').value='';
				   document.getElementById('name').focus();
				   return false;
		}
	if(echeck(emailID.value)==false)
    	{
			emailID.value=""
			emailID.focus()
		 return false;
     	}
      if(document.advertise.phone.value=='')
	  {
		   alert('Please enter phone name');
		   document.advertise.phone.focus();
		   return false;
	   }
	    if(isNaN(document.getElementById('phone').value))
	  {
		   alert('Please enter digit only');
		  document.getElementById('phone').value='';
		  document.getElementById('phone').focus();
		   return false;
	   }
	    if(document.getElementById('address').value=='')
				       {
					   alert('Please enter your address');
					   document.getElementById('address').focus();
					   return false;
					  }
             	 if(document.getElementById('builder').value=='')
				       {
					   alert('Please select banner type');
					   document.getElementById('builder').focus();
					   return false;
					  }	
					  if(document.getElementById('captcha').value=='')
				       {
					   alert('Please enter security code');
					  document.getElementById('captcha').focus();
					   return false;
					  }	
 return true;	
	  
}
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;				
		 
	  }