function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}


function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else {return true}
}
}

function validate_form(thisform)
{
with (thisform)
{
if (validate_required(name,"Please Enter a Name!")==false)
   {name.focus();return false}
   if (validate_required(plant_name,"Please Enter a Plant  Name!")==false)
       {plant_name.focus();return false}
	   else if (validate_required(plant_location,"Please Enter a Plant Location!")==false)
               {plant_location.focus();return false} 
        		else if (validate_email(email,"This is Not a Valid e-mail Address!")==false)
                	{email.focus();return false}
					else if (validate_required( file,"Please Select a File!")==false)
                            {return false} 
                                 else{hide_fields();progress_update();return true;}
								 								
 }
 
}

function hide_fields(){
	document.getElementById('submit').value="Please Wait...";
    document.getElementById('submit').disabled="disabled";
}
function show_fields(){
document.getElementById('submit').disabled="";
document.getElementById('submit').value="Submit";
location.href='index.html';
}