function doChecking()
{
	
	 if(document.form1.txtName.value=="")
	  {
		  alert("Please enter name");
		  document.form1.txtName.focus();
		  return false;
	  }
	  
	 if(document.form1.txtEmail.value=="")
	  {
		  alert("Please enter email");
		 
		  document.form1.txtEmail.focus();
		  return false;
	  }
	  
	 if (echeck(document.form1.txtEmail.value)==false){
		document.form1.txtEmail.focus()
		return false
	 }
	  
	 if(document.form1.txtPhone.value=="")
	  {
		  alert("Please enter your telephone number");
          document.form1.txtPhone.focus();
		  return false;
	  }
	
	  if(document.form1.captcha.value=="")
	  {
		  alert("Please enter Anti Spam word");
		  document.form1.captcha.focus();
		  return false;
	  }
 
}
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					
	}