function construction_form()
  {		
	if(document.construction.txtName.value.length<2 || document.construction.txtName.value.length>40)
	{ alert("Pelse enter your full name")
	   document.construction.txtName.focus();
	   return false; 
	}
		
	var i;
	var input = document.construction.txtEmail.value ;

	var lenth = input.length ;
	var ctr=0 ;

	if ( ( document.construction.txtEmail.value.charAt(i) == '!' ) || ( 	document.construction.txtEmail.value.charAt(i) == '#' ) )
    {
	  alert("Please Enter a proper Email Address") ;
	  document.construction.txtEmail.focus();
      return false;
    }
	if (input =="")
	{
		alert("Please enter Email Address") ;
	    document.construction.txtEmail.focus();
		return false ;
	}
	if(input.length == 40)
	{
		alert("Please enter a Proper Email Address") ;
	    document.construction.Email.focus();
		return false ;
	}

	for ( i=0; i < lenth; i++ )
	{
		var oneChar = input.charAt(i) ;
		if(oneChar == "@")
		{
			ctr = ctr+1 ;
		}
		if ( (i == 0 && oneChar == "@") || (i == 0 && oneChar == ".") || 
			( oneChar == " " ) )
		{
			alert ( "This does not seem to be a proper Email Address" ) ;
	        document.construction.txtEmail.focus();
			return false ;
		}
		if ( (oneChar == "@" && input.charAt(i+1) == ".") || 
			(oneChar == "." && input.charAt(i+1) == "@") ||
			(oneChar == "." && input.charAt(i+1) == ".") )
		{
			alert ( "This does not seem to be a proper Email Address" ) ;
	        document.construction.txtEmail.focus();
			return false ;
		}
		if( input.indexOf("@") < 2 )
		{
			alert ( "This does not seem to be a proper Email Address" ) ;
	        document.construction.txtEmail.focus();
			return false ;
		}
		if(input.indexOf(".")<4)
		{
			alert ( "This does not seem to be a proper Email Address" ) ;
	        document.construction.txtEmail.focus();
			return false ;
		}
		if (ctr > 1)
		{
			alert ( "This does not seem to be a proper Email Address" ) ;
	        document.construction.txtEmail.focus();
			return false ;
		}
	}
	
	if(document.construction.txtEmail.value.length>35)
	{
		alert("Pleast Enter the real Email can't more than 35 chare")
		document.construction.txtEmail.focus();
		return false;
	}	
<!-------------------End construction txtEmail--------------------------->

	if(document.construction.txtPhone.value.length<9 || document.construction.txtPhone.value.length>15)
	{ alert("Pelse enter your phone number")
	   document.construction.txtPhone.focus();
	   return false; 
	}
	
	if(document.construction.txtAddress.value.length<=3 || document.construction.txtAddress.value.length>100)
	{ alert("Plesse enter your current address")
	  document.construction.txtAddress.focus();
	  return false;
	}	
	
	if(document.construction.txtHowSonn.value.length<=2 || document.construction.txtHowSonn.value.length>200) 
	{ alert("Pelse write How soon would you like to apply construction project")
	   document.construction.txtHowSonn.focus();
	   return false;
	}
}